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Best Drill Bits of 2026

Updated
The right bit does the drilling, not the drill. Here's how to pick the one your job needs.

Our Top Picks

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Image
Model
Product Comparison Table
Features

Product Image of the DEWALT Drill Bit Set, Titanium Nitride Coated, 14-Piece (DW1354)
Best Titanium-Coated Drill Bits
DeWALT Titanium Drill Bit Set
  • 14-piece set
  • Titanium-coated
  • Broad size range
Product Image of the DEWALT Drill Bit Set, 21 Pc. Titanium Nitride Coated Pilot Point DEWALT Bit Set with Case for Wood, Metal and Plastic (DW1361)
Best Drill Bits for a Drill Press
DeWALT Titanium Drill Bit Set
  • Pilot point tip
  • Titanium-coated
  • Ideal for drill presses
Product Image of the Drill America - KFD29J-PC 29 Piece Heavy Duty High Speed Steel Drill Bit Set with Black and Gold Finish in Round Case (1/16" - 1/2" x 64ths), KFD Series
Best Drill Bits for Wood and Metal
Drill America 29-Piece HSS Drill Bit Set
  • 29-piece
  • 135-degree split point
  • Black and gold oxide
Product Image of the IRWIN Drill Bit Set, M35 Cobalt Alloy Steel Steel, 29-Piece (3018002)
Best Drill Bits for Metal
Irwin M35 Cobalt Drill Bit Set
  • 29-piece
  • M35 (5% cobalt)
  • 135-degree split point
Product Image of the Makita 5 Piece - SDS-Plus Drill Bit Set For SDS+ Rotary Hammers - Aggressive Drilling For Concrete & Masonry - Carbide Tipped Bits
Best Drill Bits for Concrete
Makita SDS-Plus Drill Bit Set
  • Specially designed flutes
  • Tungsten carbide-tipped
  • SDS design
Product Image of the IRWIN Tools Hanson Screw Extractor and Drill Bit Set, 35 Piece, 11135ZR
Best Drill Bits for Automotive Use
Irwin Screw Extractor/Drill Bit Set
  • 8% cobalt steel
  • Extractor set
  • Removes frozen bolts
Product Image of the DEWALT Masonry Drill Bit Set, Percussion, Concrete & Block, 7-Piece (DW5207)
Best Drill Bits for Masonry
DeWALT Masonry Drill Bit Set
  • Manufactured in Germany
  • Rock carbide tip
  • 7-piece set
Product Image of the DEWALT Drill Bit Set, 21 Pc High Speed Steel DEWALT Bits, Black and Gold Oxide Coated, 135 Degree Split Point, 31 Degree Helix (DWA1181)
Best Black Oxide Drill Bits
DeWALT 21-Piece Black Oxide Drill Bit Set
  • 21-piece
  • Black oxide coating
  • Parabolic flutes
Product Image of the COMOWARE Titanium Twist Drill Bit Set 16 Pcs, 1/16"-1/4, Hex Shank HSS
Best Drill Bits for PVC
COMOWARE Titanium 16-Piece Drill Bit Set
  • 16-piece
  • Hex shank
  • Titanium-coated HSS
Product Image of the Bosch GT3000 8 pc. Glass and Tile Bit Set
Best Drill Bits for Tile
Bosch Glass and Tile Bit Set
  • Diamond ground edges
  • Carbide-tipped
  • Ideal for fragile materials

Our Review Criteria: Bit material governs everything else, because a bit wrong for the surface fails no matter how well it is made. We matched high-carbon steel, HSS, cobalt (M35 and M42), carbide, and diamond to the materials each is built to cut, then compared point geometry (a 118-degree point centers in wood, a 135-degree split point self-centers on metal), flute design and chip clearance, shank fit across round, hex, and SDS-Plus chucks, and coatings such as black oxide and titanium nitride. We read manufacturer specifications against independent and owner reviews to surface weaknesses a spec sheet hides, such as brittleness in cobalt bits or coatings that wear at the tip. We check every set for availability and swap it when discontinued.

The drill supplies the spin, but the bit does the cutting. Hang a picture, build a deck, or punch a hole in concrete, and it is the small piece of steel at the end doing the real work.

Grab the wrong one and you dull the edge, wander off your mark, or snap the bit mid-hole. Two things decide the match: the bit’s material, which sets how hard a surface it can cut, and its point geometry, which sets how cleanly it starts. Get both right and the hole almost drills itself.

We broke down ten of the best drill bit sets on the market, from a general-purpose titanium kit to specialists for concrete, hardened steel, and glass. Each pick is judged on material, point and flute design, size range, and the job it is actually built for.


Are Drill Bits Interchangeable?

For the most part, yes. Modern drills usually feature a universal three-jaw chuck. Most drills easily grip round and hexagonal shanks, which are the industry standards.

However, there are exceptions. Rotary hammer drills often use SDS chucks (Slotted Drive System), which require specialized bits with grooves in the shank. Impact drivers strictly use 1/4-inch hex shanks. Always check your tool’s chuck type before buying a new set.

How to Choose the Best Drill Bit

Every bit serves a purpose. You wouldn’t use a wood spade bit on concrete, and you shouldn’t use a masonry bit on sheet metal. Here is what you need to know before you buy.

Drill Bit Materials

The material of the bit determines what it can cut through and how long it lasts.

High-Carbon Steel

This is your basic, budget-friendly option. Manufacturers temper the steel to add strength. High-carbon drill bits cut metal and wood effectively, but they have a downside.

They lose their edge quickly when they get hot. If you drill too fast or hit hard material, the temper ruins. You will need frequent sharpening to keep them viable.

High-Speed Steel (HSS)

HSS is the standard for general-purpose drilling. These bits resist heat much better than high-carbon steel. Because they handle higher temperatures without losing their temper, they stay sharp longer.

You can use HSS bits on wood, plastic, soft metals, and aluminum.

Cobalt (HSBO)

Think of this as HSS on steroids. Manufacturers mix about 5% to 8% cobalt into the steel alloy. This creates incredible heat resistance.

Cobalt steel bits are the go-to choice for drilling stainless steel, cast iron, and other abrasive metals. The trade-off is brittleness; if you tilt the drill while working, these bits can snap.

Carbide

Carbide is one of the hardest materials available. You usually find carbide tips on masonry bits. They chew through reinforced concrete, tile, and stone. Like cobalt, they are extremely brittle and should be used with a steady hand.

Diamond

When you need to cut brittle surfaces such as glass, porcelain, or tile, you need diamond. These bits grind rather than cut. They feature diamond dust fused to the cutting edge. They are expensive and specialized, but nothing works better for delicate, hard surfaces.

Drill Bit Coatings

Coatings act as a shield for the steel underneath, reducing friction and heat.

Black Oxide

This is a standard conversion coating. It prevents rust and retains lubricants, which helps reduce friction. It works well for general drilling in wood and mild steel.

Titanium Nitride (TiN)

You will recognize these by their gold color. This ceramic coating is incredibly hard. It creates a thermal barrier that protects the HSS bit underneath, potentially extending the tool’s life by three times. Once the gold coating wears off from sharpening, the benefits decrease.

Drill Point Angle

The angle of the tip changes how the bit bites into the material.

118-Degree Standard

This is the classic shape, with a pointy tip that centers well in wood. On flat metal it tends to “walk” off your mark unless you punch a starter dimple first. The wide chisel edge on a 118-degree tip also turns much of your drilling force into heat rather than chips, so it needs firmer, steadier feed pressure to cut cleanly through steel.

135-Degree Self-Centering

This profile is flatter, and the “split point” ground into the tip lets the bit bite into metal immediately without walking, so you can skip the center punch. Because it self-centers, it starts the hole without a pilot, which is why it is the standard for stainless steel and other hard alloys. One catch shows up at sharpening time: a split point cannot be restored on a plain bench grinder and needs a dedicated split-point jig or sharpener to bring back.

Drill Point Length

The length of the cutting lip affects how aggressive the cut is. Generally, shorter cutting lips (twist bits) are for metal, while longer spurs (like on brad point bits) are designed to slice through wood fibers cleanly.

Flute Design

The flute is the spiral groove running up the bit. Its job is to channel dust and chips out of the hole. If the flute clogs, the bit overheats.

Standard bits have two flutes. Some masonry bits utilize four flutes to eject heavy concrete dust faster. High-performance bits often feature parabolic flutes, which have a unique shape to clear chips more efficiently in deep holes.

Who Makes the Best Drill Bits?

While generic bits exist, sticking to reputable brands usually guarantees better steel quality and quality control.

DeWALT

DeWALT is one of the biggest names in the tool industry. Raymond E. DeWalt started the company in 1923 by inventing the radial arm saw to speed up lumber processing (1).

Today, they are one of the most recognizable tool brands globally. Their drill bits, particularly the Pilot Point and titanium lines, are favorites among contractors.

Bosch

Robert Bosch launched his engineering workshop in Stuttgart, Germany, back in 1886. The company built a reputation on precision mechanics and automotive innovation (2).

Now, Bosch is a massive global entity. They are particularly famous for their concrete and masonry bits, like the Bulldog Xtreme series.

Irwin Tools

Charles Irwin patented his solid-center auger bit in 1884, a design that made wood boring far cleaner and faster, and the company that grew from it kept his name. That heritage in cutting tools still shapes the brand.

Irwin is now a go-to brand for wood-boring bits, spade bits, and cobalt bits for metalworking.

Makita

Makita began in 1915 as a motor repair shop in Japan. They pivoted to power tools in 1958 with the release of an electric planer (3).

They are known for their battery technology and “Impact Gold” bit series, which are designed to withstand the high torque of impact drivers.


Product Reviews

We compared sets that hold up across wood, metal, masonry, and glass, scoring each on material, point and flute geometry, size range, and the job it is built for. From a do-everything general kit to specialists for stainless steel or tile, here are our ten picks.

DeWALT Titanium 14-Piece Drill Bit Set

Best Titanium-Coated Drill Bits

Our Rating4.5 / 5
Material Quality
4.5 / 5
Cutting Efficiency
4.5 / 5
Compatibility
4.5 / 5
Durability
4.5 / 5
Total Rating
4.5 / 5

DeWALT consistently delivers reliable accessories, and this 14-piece titanium-coated set is our top pick for general use. These bits handle both wood and metal with ease, making them perfect for the average homeowner’s toolbox.

The standout feature is the “Pilot Point” tip. It starts drilling on contact, preventing the bit from walking across your material. This clean start means you rarely need to use a center punch.

The sizes run from 1/16-inch to 1/2-inch. We also appreciate the “no-spin” shanks on the larger bits; they have flat sides ground onto the shaft so the chuck can grip them tightly without slipping. DeWALT claims the titanium coating extends the life of these bits two times beyond standard options.

Pros

  • Versatile: 14-piece set covers most common tasks.
  • Durable: Titanium coating resists heat.
  • Grip: No-spin shanks prevent slipping in the chuck.
  • Value: Professional features at a DIY price.

Cons

  • Origin: Manufactured in China.

Product Specs

Pieces in set 14
Material Titanium-coated steel
Weight 14.9 ounces
Best for Metal, wood
Cost $

DeWALT 21-Piece Titanium Drill Bit Set

Best Drill Bits for a Drill Press

Our Rating4.5 / 5
Material Quality
4.5 / 5
Cutting Efficiency
4.5 / 5
Compatibility
4.5 / 5
Durability
4.5 / 5
Total Rating
4.5 / 5

When you are setting up a drill press, you want a wide range of sizes readily available. This DeWALT 21-piece kit offers granular size options from 1/16-inch up to 1/2-inch, ensuring you always have the precise diameter for the job.

Like the smaller set, these feature the titanium coating for heat resistance and the Pilot Point tip. The tip design is excellent for drill presses because it self-centers, reducing the need for clamping and center punching on softer materials.

The tough plastic case keeps everything organized, which is essential in a busy shop environment. The titanium coating should outlast black oxide bits significantly, especially when used for repetitive drilling tasks.

Pros

  • Precision: Pilot Point reduces walking.
  • Long Life: Titanium coating fights heat buildup.
  • Variety: 21 sizes cover almost any standard project.
  • Organization: Includes a durable storage case.

Cons

  • Origin: Made in China.

Product Specs

Pieces in set 21
Material Titanium-coated steel
Weight 1.05 pounds
Best for Wood, metal, drill press
Cost $$

Drill America KFD29J 29-Piece HSS Drill Bit Set

Best Drill Bits for Wood and Metal

Our Rating4.5 / 5
Material Quality
4.5 / 5
Cutting Efficiency
4.5 / 5
Compatibility
4.5 / 5
Durability
4.5 / 5
Total Rating
4.5 / 5

If you want one twist-bit set that moves between wood, softwood, and harder metals without swapping kits, this Drill America KFD29J set earns the spot. It is a contractor-grade workhorse rather than a specialist tool, which is exactly what most home shops actually reach for.

The set spreads 29 sizes from 1/16-inch to 1/2-inch in 1/64-inch increments, so you rarely have to round up or down to the wrong diameter. Each bit is high-speed steel finished with a black-and-gold oxide coating that resists rust and cuts friction on hard material.

The detail that sets it apart from a budget HSS set is the 135-degree split-point tip. It bites on contact and stops the bit from skating across sheet metal or a glazed knot, so you can skip the center punch on most starts. The bits resharpen on a bench grinder, which stretches the kit’s life well past a coated-only set.

Pros

  • Range: 29 sizes in fine 1/64-inch steps.
  • Accurate Starts: 135-degree split point resists walking.
  • Versatile: Handles wood, plastic, and harder metals.
  • Serviceable: HSS bits can be resharpened.

Cons

  • Not for Stainless: Plain HSS struggles on hardened steel; step up to cobalt.
  • Case: The round index can be awkward to reload one-handed.

Product Specs

Pieces in set 29
Material High-speed steel, black and gold oxide
Size range 1/16-inch to 1/2-inch
Best for Wood, plastic, mild metal
Point angle 135-degree split point

Irwin 29-Piece M35 Cobalt Drill Bit Set

Best Drill Bits for Metal

Our Rating4.5 / 5
Material Quality
4.5 / 5
Cutting Efficiency
4.5 / 5
Compatibility
4.5 / 5
Durability
4.5 / 5
Total Rating
4.5 / 5

Standard HSS bits burn up the moment they touch stainless steel or cast iron, which is why hard-metal work calls for cobalt. This Irwin set is built from M35 alloy, meaning roughly 5% cobalt is melted into the steel itself rather than coated on top. That heat tolerance is what lets the cutting edge survive the friction these metals throw off.

The 29-bit lineup runs from 1/16-inch to 1/2-inch in 1/64-inch increments, so it covers fine fabrication sizes most cobalt sets skip. Each bit uses a 135-degree split point that starts on contact, which matters even more on metal because a wandering bit ruins the workpiece.

Irwin builds these with a heavy-duty web for rigidity, and the three-cartridge index case keeps the sizes findable on a busy bench. The honest trade-off is the one every cobalt bit shares: the alloy is hard but brittle, so a side-load or a tilted drill can snap the thinner sizes. Run it slow with cutting fluid and keep the bit straight.

Pros

  • Through-and-Through Cobalt: M35 alloy survives stainless and cast iron.
  • Fine Coverage: 29 sizes in 1/64-inch steps.
  • Accurate: 135-degree split point bites without walking.
  • Serviceable: Solid cobalt resharpens without losing its grade.

Cons

  • Brittle: Side pressure can snap the smaller bits.
  • Technique: Needs slow speed and cutting fluid to last.

Product Specs

Pieces in set 29
Material M35 cobalt alloy steel
Size range 1/16-inch to 1/2-inch
Best for Stainless steel, cast iron, hard metal
Point angle 135-degree split point

Makita 5-Piece SDS-Plus Drill Bit Set

Best Drill Bits for Concrete

Our Rating4.25 / 5
Material Quality
4.5 / 5
Cutting Efficiency
4.5 / 5
Compatibility
3.5 / 5
Durability
4.5 / 5
Total Rating
4.25 / 5

If you own a rotary hammer drill, you need SDS-Plus bits. This Makita set is designed specifically for that purpose. The slotted shank locks into the drill, allowing it to hammer back and forth with massive force without slipping.

These are the bits you want for punching holes in concrete or brick. The tips feature tungsten carbide, which is hard enough to crush masonry and cut through rebar. Makita claims these tips last up to four times longer than standard masonry bits.

The set includes five essential sizes from 3/16-inch to 1/2-inch. The flute design effectively channels concrete dust out of the hole, which keeps the bit cooler and speeds up your work.

Pros

  • Efficient: High-volume flutes clear dust quickly.
  • Tough: Tungsten carbide tips handle reinforced concrete.
  • Secure: SDS-Plus shank eliminates slipping.
  • Focused: 5-piece set covers key masonry sizes.

Cons

  • Compatibility: Only fits SDS-Plus rotary hammers.
  • Limited Use: Not for wood or metal.

Product Specs

Pieces in set 5
Material Tungsten carbide-tipped
Weight 11.2 ounces
Best for Concrete
Cost $

Irwin 35-Piece Screw Extractor/Drill Bit Set

Best Drill Bits for Automotive Use

Our Rating4.25 / 5
Material Quality
4 / 5
Cutting Efficiency
4 / 5
Compatibility
4.5 / 5
Durability
4.5 / 5
Total Rating
4.25 / 5

Mechanics know the pain of a snapped bolt or a stripped screw head. This Irwin 35-piece set is a lifesaver for automotive work. It isn’t just a drill bit set; it’s a full extraction kit.

You get high-quality drill bits to bore into the damaged fastener, plus spiral screw extractors to grip and reverse it out. The included drill bits are cobalt alloy, meaning they can drill into hardened automotive bolts without dulling instantly.

The left-hand bits are particularly clever, often, the act of drilling into the bolt in reverse is enough to loosen it. Sizes range from tiny 5/64-inch bits for small fittings up to 1/2-inch for larger bolts.

Pros

  • Material: Cobalt bits handle hardened steel.
  • Function: specialized extractors for stripped screws.
  • Design: Reverse spiral flutes help back out bolts.
  • Comprehensive: 35-piece set covers most auto needs.

Cons

  • Price: More expensive than standard sets.
  • Complexity: Requires some skill to use effectively.

Product Specs

Pieces in set 35
Material Cobalt steel
Weight 1 pound
Best for Automotive industry, metal, removing stripped bolts
Cost $$$

DeWALT 7-Piece Masonry Drill Bit Set

Best Drill Bits for Masonry

Our Rating4 / 5
Material Quality
4 / 5
Cutting Efficiency
4 / 5
Compatibility
4.5 / 5
Durability
4 / 5
Total Rating
4 / 5

This 7-piece set from DeWALT is a great companion for standard hammer drills (non-SDS). If you need to mount a TV bracket into brick or anchor a shelf into a concrete wall, this kit has you covered.

The sizes range from 3/16-inch to 1/2-inch. DeWALT uses a Rock Carbide tip designed to withstand the percussion impact of drilling into stone and concrete. The shanks have three flat sides, which is a massive plus; it prevents the bit from spinning inside the chuck under high torque.

The spiral flutes are engineered to pull dust out efficiently. While not as heavy-duty as SDS bits, these are perfect for DIY masonry jobs around the house.

Pros

  • Quality: Made in Germany.
  • Tip: Rock carbide handles concrete and stone.
  • Grip: Flat shanks eliminate chuck slip.
  • Value: Affordable masonry solution.

Cons

  • Durability: Not intended for industrial rotary hammers.
  • Fragile: Carbide is brittle; avoid bending forces.

Product Specs

Pieces in set 7
Material Carbide-tipped steel
Weight 8.8 ounces
Best for Masonry, concrete
Cost $

DeWALT 21-Piece Black Oxide Drill Bit Set

Best Black Oxide Drill Bits

Our Rating4 / 5
Material Quality
4 / 5
Cutting Efficiency
4.5 / 5
Compatibility
4 / 5
Durability
4 / 5
Total Rating
4 / 5

Black oxide is the coating most pros default to for general drilling, and this DeWALT 21-piece set shows why. The conversion coating holds lubricant and shrugs off rust, so the bits keep cutting cleanly in wood, hardwood, PVC, fiberglass, and mild steel without the price jump of titanium or cobalt.

The sizes span 1/16-inch to 1/2-inch, with a few of the most-used small diameters doubled up so the first bit you snap doesn’t end the job. A 135-degree split point starts the hole on contact and keeps the bit from walking on metal.

What lifts this above a basic black-oxide kit is the parabolic flute paired with a 31-degree helix. The wide flute clears chips fast in deep holes, while the reduced helix angle tames the aggressiveness that makes true parabolic bits grab. It is a sensible all-rounder for someone who wants durable, sharpenable bits without overpaying.

Pros

  • Corrosion Resistance: Black oxide holds lubricant and fights rust.
  • Chip Clearing: Parabolic flutes eject debris from deep holes.
  • Accurate Starts: 135-degree split point reduces walking.
  • Practical Sizes: Common diameters doubled for breakage.

Cons

  • Mild Metal Only: Coating offers no edge on stainless or cast iron.
  • Coating Wears: The oxide layer fades with heavy use and sharpening.

Product Specs

Pieces in set 21
Material Black oxide high-speed steel
Size range 1/16-inch to 1/2-inch
Flute Parabolic, 31-degree helix
Best for Wood, PVC, mild steel

COMOWARE 16-Piece Titanium Drill Bit Set

Best Drill Bits for PVC

Our Rating3.75 / 5
Material Quality
3.5 / 5
Cutting Efficiency
4 / 5
Compatibility
4.5 / 5
Durability
3.5 / 5
Total Rating
3.75 / 5

Not every job needs industrial steel. For curtain rods, PVC pipe, and the steady stream of small holes a household generates, this COMOWARE set is the budget pick that does the work without overspending.

The bits are titanium-coated high-speed steel, so they slide through plastic, wood, and aluminum with low friction and shrug off the rust that kills cheap bare-steel bits in a damp garage. Sizes run from 1/16-inch to 1/4-inch, covering the light-duty range and nothing heavier.

The useful twist here is the 1/4-inch hex shank on every bit. That means they snap straight into an impact driver or a quick-change chuck, no adapter needed, which is handy if your everyday tool is a driver rather than a full drill. The two-flute geometry clears chips fast on soft material. Treat it as a starter or glovebox kit, not a metalworking set.

Pros

  • Quick-Change: 1/4-inch hex shank fits impact drivers.
  • Coated: Titanium finish resists corrosion and friction.
  • Light-Duty Ready: Clean cuts in PVC, wood, and aluminum.
  • Budget: An inexpensive starter kit for a first toolbox.

Cons

  • Small Sizes Only: Tops out at 1/4-inch.
  • Light Build: Not for stainless or repeated heavy metal drilling.

Product Specs

Pieces in set 16
Material Titanium-coated high-speed steel
Shank 1/4-inch hex
Size range 1/16-inch to 1/4-inch
Best for PVC, plastic, wood

Bosch 8-Piece Glass and Tile Bit Set

Best Drill Bits for Tile

Our Rating3.75 / 5
Material Quality
4.5 / 5
Cutting Efficiency
4.5 / 5
Compatibility
2.5 / 5
Durability
4 / 5
Total Rating
3.75 / 5

Drilling through tile is risky; one wrong move and the tile cracks. Bosch designed these carbide-tipped bits specifically to reduce that stress. They feature a spear-point design that grinds through the hard glaze of ceramic and glass without shattering it.

The set ranges from 1/8-inch to 3/4-inch. Bosch uses a three-sided flat shank to ensure the bit doesn’t slip in the chuck, which is critical when you need precise control on slippery surfaces.

These aren’t for hammer drills, use them on a low-speed rotary setting with water for cooling, and they will cut clean holes for bathroom fixtures and mirrors effortlessly.

Pros

  • Precision: Diamond-ground carbide tip.
  • Control: No-spin flat shanks.
  • Safety: Designed to prevent tile cracking.
  • Application: Ideal for glass, ceramic, and mirrors.

Cons

  • Specialized: Useless on wood or metal.
  • Speed: Requires slow drilling and lubrication.

Product Specs

Pieces in set 8
Material Carbide-tipped steel
Weight 3.36 ounces
Best for Tile, glass, ceramics
Cost $$

Product Comparison Chart

Product Best Pieces in set Material Weight Best for
DeWALT Titanium Drill Bit Set Titanium-Coated 14 Titanium-coated steel 14.9 oz Metal, wood
DeWALT Titanium Drill Bit Set Drill Press 21 Titanium-coated steel 1.05 lbs Wood, metal, drill press
Drill America 29-Piece HSS Drill Bit Set Wood and Metal 29 HSS, black and gold oxide 1/16″ to 1/2″ Wood, plastic, mild metal
Irwin M35 Cobalt Drill Bit Set Metal 29 M35 cobalt alloy steel 1/16″ to 1/2″ Stainless steel, cast iron
Makita SDS-Plus Drill Bit Set Concrete 5 Tungsten carbide-tipped 11.2 oz Concrete
Irwin Screw Extractor/Drill Bit Set Automotive Use 35 Cobalt steel 1 lb Automotive industry, metal, removing stripped bolts
DeWALT Masonry Drill Bit Set Masonry 7 Carbide -tipped steel 8.8 oz Masonry, concrete
DeWALT 21-Piece Black Oxide Drill Bit Set Black Oxide 21 Black oxide HSS 1/16″ to 1/2″ Wood, PVC, mild steel
COMOWARE Titanium 16-Piece Drill Bit Set PVC 16 Titanium-coated HSS 1/16″ to 1/4″ PVC, plastic, wood
Bosch Glass and Tile Bit Set Tile 8 Carbide-tipped steel 3.36 oz Tile, glass, ceramics

How to Use Drill Bits

Installing a bit is easy, but doing it correctly prevents wobble and accidents. Here is the quick rundown.

1. Match the Bit to the Material

Identify your surface. Standard twist bits are great for wood and light metal. If you are hitting concrete, switch to a masonry bit. If you need a large hole in wood (like for a door lock), grab a spade bit or hole saw.

2. Check Your Chuck

Most modern drills have keyless chucks. Hold the drill grip and rotate the chuck collar counter-clockwise to open the jaws. If you have an older drill, you will need the chuck key to loosen it.

3. Insert and Center

Slide the bit shank into the jaws. Ensure it is centered between all three jaws, sometimes a small bit can slip into the gap between two jaws, which causes it to spin off-center.

4. Tighten It Down

Rotate the collar clockwise to hand-tighten. Once it grips the bit, give it a firm twist to lock it. If you are using a keyed chuck, insert the key into the side hole and turn clockwise until tight.

5. Set Your Speed

Drills usually have a speed switch (1 or 2). Use “1” (Low Speed/High Torque) for large bits and driving screws. Use “2” (High Speed) for small drill bits.

6. Drill Straight

Place the tip on your mark. Apply steady pressure directly in line with the bit. Don’t push too hard; let the sharp edges do the work. If you are drilling deep, pull the bit out slightly every few seconds to clear the dust.

FAQs

What Drill Bits Stay Sharp the Longest?

Cobalt drill bits stay sharp the longest when cutting metal. The cobalt alloy runs cooler than plain steel, so the cutting edge survives the heat that dulls standard HSS. For abrasive masonry, carbide-tipped bits outlast everything, though they are too brittle for general wood or metal work. Coated bits like titanium and black oxide last longer than bare HSS but lose the coating at the tip once you sharpen them.

Why Do My Drill Bits Keep Breaking?

Drill bits break from too much pressure or from side-loading the tip. Push too hard and a thin bit flexes and snaps; tilt the drill while the bit is buried and the side force shears it instantly. Running the wrong bit for the material, like an HSS twist bit on concrete or a masonry bit on steel, overheats and cracks it too. Let the edge do the cutting, keep the drill square to the surface, and back out to clear chips every few seconds.

What Drill Bit Is Best for Hardened Steel?

For hardened steel, use a cobalt bit (M35 or M42 grade) or a solid carbide bit. Standard high-speed steel is softer than hardened steel, so it spins, burns, and never bites. Run the drill slow, keep steady pressure, and flood the hole with cutting fluid to carry off the heat, which is what actually destroys the bit on tough alloys.

Are Cobalt or Titanium Drill Bits Better?

It depends on the metal. Cobalt bits are a solid alloy the whole way through, so they cut hard metals like stainless steel and cast iron and can be resharpened without losing their grade. Titanium bits are HSS with a hard coating, cheaper and fine for general wood and mild-steel work, but the coating wears off the tip over time. Pick cobalt for hard metal, titanium for everyday general drilling.

What Is the Best Kind of General-Purpose Drill Bit?

For most homeowners, a titanium nitride (TiN) coated HSS set is the best general-purpose choice. It resists corrosion, cuts wood, plastic, and mild steel cleanly, and costs far less than solid cobalt. Look for a 135-degree split point so the bits start without walking. Step up to cobalt only when you regularly drill stainless or other hardened metal.

Can I Sharpen Dull Drill Bits?

Yes, HSS and cobalt bits resharpen on a bench grinder or a dedicated drill-bit sharpener. Two catches to know: titanium-coated bits lose their gold coating at the tip once you grind them, which cuts their heat resistance, and a 135-degree split point cannot be restored on a plain bench grinder, it needs a split-point jig or sharpener. Standard 118-degree points are the easiest to touch up by hand.


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About the Author

Mark Weir

Mark spent 24 years working in real estate, so he knows his way around a home. He also worked with contractors and experts, advising them on issues of planning, investments, and renovations. Mark is no stranger to hands-on experience, having renovated his own home and many properties for resale. He likes nothing better than seeing a project through to completion.