1/2" Drill Bits | McMaster-Carr

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System of Measurement

Drill Bit Size

0.35 mm to 2.5 mm (Increments of 0.05 mm)

1", 1 1/32", 1 1/16", 1 1/8", 1 5/32", 1 3/16", 1 1/4", 1 5/16", 1 3/8", 1 7/16", 1 1/2"

1.0 mm to 10.0 mm (Increments of 0.5 mm)

1.0 mm to 13.0 mm (Increments of 0.5 mm)

1.0 mm to 5.9 mm (Increments of 0.1 mm)

1.0 mm to 6.9 mm (Increments of 0.1 mm)

1.0 mm to 7.0 mm (Increments of 0.5 mm)

1/16" to 1/2" (Increments of 1/64")

1/16" to 1/2" (increments of 1/32")

1/16" to 1/4" (Increments of 1/64")

1/16" to 3/8" (Increments of 1/64")

1/2" to 1" (Increments of 1/64")

1/64" to 1/4" (increments of 1/64")

2.6 mm to 10.0 mm (Increments of 0.1 mm)

6.0 mm to 10.0 mm (Increments of 0.1 mm)

9/16" to 1" (increments of 1/16")

33/64" to 63/64" (Increments of 1/64")

Length Class

Sold As

Shank Type

Drill Bit Point Type

Finish

Aluminum Titanium Nitride (AlTiN) Coated

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Nitride (TiN) Coated

Material

Overall Length

Shank Size

Bit Style

Flute Type

Point Angle

Number of Pieces

Drill Bit Sizes Included

1 each in sizes 1/8"-1/2", 3/16"-1/2", 1/4"-3/4"

1 each in sizes 1/8"-1/2", 3/16"-1/2", 3/16"-7/8", 13/16"-1 3/8"

1 each of sizes 19/64" and 31/64"

1.0-13.0 mm (increments of 0.5 mm)

1/16"-1/2" (increments of 1/32")

1/16"-1/2" (increments of 1/64")

1/2"

1/2" (10 5/8" Lg.)

1/2" (6 5/8" Lg.)

1/2"-1" (increments of 1/64")

Maximum Drilling Depth

Flute Direction

Container Type

Decimal Size Equivalent

Number of Flutes

For Drilling Type

Hammer and Rotary

Rotary Only

DFARS Specialty Metals

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

EAR99

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265 Products

About Drill Bits

Compare material, finish, length class, and decimal size equivalents.

Drill Bits

Sold as Sets

High-Speed Steel Drill Bit Sets

Cut holes in a variety of metals, from the softest aluminum to the hardest steel

20 products

Cobalt Steel Drill Bit Sets

Tough and wear resistant to last at least twice as long as high-speed steel bits

7 products

Carbide-Tipped Drill Bit Sets for Masonry and Concrete

Crush tough materials to make holes in masonry

7 products

Left-Hand High-Speed Steel Drill Bit Sets

Remove stripped screws with flutes that spiral in reverse from other bits

2 products

Short-Flute Cobalt Steel Drill Bit Sets

The rigidity of short-length bits without sacrificing reach

1 product

High-Speed Steel Drill Bit Sets for Plastic

Penetrate gradually to prevent cracking and chipping

1 product

Precise-Cut Drill Bit Sets for Wood

Cut accurate straight and overlapping holes, even across the grain

1 product

Hole-Enlarging Reduced-Shank Drill Bit Sets

An alternative to reamers for enlarging an existing drilled hole

1 product

Carbide-Tipped Drill Bit Sets

Stronger than cobalt and high-speed steel, bits stay sharp at high temperatures

1 product

Step Drill High-Speed Steel Bit Sets

Simplify jobs by drilling multiple hole sizes using a single bit

3 products

Fast-Cutting Smooth-Finish Drill Bit Sets for Wood

Create less friction and heat buildup than other smooth-finish bits to run faster and last longer

1 product

Carbide Drill Bit Sets

The hardest and most wear-resistant drill bits you can buy

1 product

Reduced-Shank High-Speed Steel Drill Bit Sets

Make large holes using standard-size tools

3 products

Chip-Clearing High-Speed Steel Drill Bit Sets

Prevent clogs and dissipate heat when drilling most metals

2 products

Chip-Clearing Carbide-Tipped Drill Bit Sets for Masonry and Concrete

Lift dust and debris out of the hole more quickly than standard masonry bits

3 products

Drill Bit Sets for Wood

Make rough holes in wood

1 product

Sold Individually

High-Speed Steel Drill Bits

Cut holes in a variety of metals, from the softest aluminum to the hardest steel

22 products

Carbide-Tipped Drill Bits for Masonry and Concrete

Crush tough materials to make holes in masonry

28 products

High-Speed Steel Step Drill Bits

Simplify jobs by drilling multiple hole sizes using a single bit

16 products

Cobalt Steel Drill Bits

Tough and wear resistant to last at least twice as long as high-speed steel bits

11 products

Cobalt Steel Step Drill Bits

One bit drills multiple hole sizes and lasts twice as long as high-speed steel

4 products

Reduced-Shank High-Speed Steel Drill Bits

Make large holes using standard-size tools

3 products

Carbide Drill Bits

The hardest and most wear-resistant drill bits you can buy

6 products

Coolant-Fed Carbide-Tipped Drill Bits

Coolant flows through the bit to reduce heat and evacuate chips

6 products

Carbide-Tipped Drill Bits

Stronger than cobalt and high-speed steel, bits stay sharp at high temperatures

5 products

Quick-Change Hex High-Speed Steel Drill Bits

Save time when you need to change bits frequently

2 products

Chip-Clearing High-Speed Steel Drill Bits

Prevent clogs and dissipate heat when drilling most metals

7 products

Tapping Screw Installation Drill Bits for Masonry and Concrete

Slightly smaller than the screw size for a tight fit after installation

5 products

Precise-Cut High-Speed Steel Drill Bits

Produce holes so precise that you don’t need to finish them with a reamer

1 product

Coolant-Fed Carbide Drill Bits

The hardest and most wear-resistant bits deliver coolant to reduce heat and evacuate chips

2 products

Short-Flute High-Speed Steel Drill Bits

The rigidity of short-length bits without sacrificing reach

2 products

Chip-Clearing Drill Bits for Wood

Prevent clogs that wear the bit and slow down drilling

2 products

High-Speed Steel Drill Bits for Plastic

Penetrate gradually to prevent cracking and chipping

1 product

Left-Hand Cobalt Steel Drill Bits

The flutes spiral in the opposite direction of other bits and stay sharp longer than high-speed steel

1 product

Reduced-Shank Carbide-Tipped Drill Bits

Our hardest reduced-shank bits make large holes with standard-size tools

1 product

Drill Bits for Wood

Make rough holes in wood

2 products

Carbide Drill Bits for Carbon Fiber, Fiberglass, and Graphite

Drill abrasive materials cleanly

3 products

Smooth-Finish Carbide Drill Bits

More cutting edges for a consistent finish

1 product

Precise-Cut Carbide Drill Bits

Even on the hardest materials, cut holes so precise that you don’t need to finish them with a reamer

1 product

Steel Precise-Cut Drill Bits for Wood

Cut accurate straight and overlapping holes, even across the grain

1 product

Carbide-Tipped Drill Bits for Glass and Ceramic

Extremely hard and wear resistant to maintain a sharp edge cut after cut

1 product

Short-Flute Carbide-Tipped Drill Bits

Our strongest short-flute bits stay sharp when drilling abrasive materials, such as titanium

2 products

Hole-Enlarging Reduced-Shank Drill Bits

An alternative to reamers for enlarging an existing drilled hole

1 product

Carbide-Insert Drill Bits

Once the cutting edges wear down, just change the inserts

7 products

Carbide-Tipped Drill Bits for Hardened Steel

Straight flutes withstand the heavy pressure needed to penetrate hardened steel

1 product

Left-Hand High-Speed Steel Drill Bits

Remove stripped screws with flutes that spiral in reverse from other bits

2 products

Carbide Drill Bits for Hardened Steel

The hardest and most wear-resistant bits handle the heavy pressure needed to penetrate hardened steel

2 products

High-Speed Steel Precise-Cut Drill Bits for Wood

Point stays sharp longer to cut accurate straight and overlapping holes

1 product

Hole-Starting Carbide Drill Bits

Harder and last longer than cobalt steel, bits create an accurate starting place in your workpiece

9 products

Anchor Installation Drill Bits for Masonry and Concrete

Ensure the right depth so drop-in anchors don't fall too far into the hole

2 products

Short-Flute Cobalt Steel Drill Bits

Combine the toughness and wear resistance of cobalt with short flutes for rigidity

1 product

Rebar-Cutting Carbide-Tipped Drill Bits

No need to move the hole when you encounter rebar in concrete

4 products

Carbide-Tipped Drill Bits for Stone

Grind through stone, granite, and slate tile without cracking it

1 product

Chip-Clearing Cobalt Steel Drill Bits

Avoid clogs and dissipate heat with bits that last at least twice as long as high-speed steel

2 products

Chip-Clearing High-Speed Steel Drill Bits for Aluminum, Brass, and Bronze

Wide flutes clear chips from soft metals that can gum up other drill bits

1 product

Flexible-Shaft Drill Bits for Wire Installation

Drill inside walls and between floors to install electrical wiring without cutting extra holes

3 products

Hole-Starting Cobalt Steel Drill Bits

Create an accurate starting place for a precise final hole

4 products

Fast-Cutting Smooth-Finish Drill Bits for Wood

Create less friction and heat buildup than other smooth-finish bits to run faster and last longer

1 product

Chip-Clearing Carbide Drill Bits

The hardest and most wear-resistant bits prevent clogs and dissipate heat

2 products

Chip-Clearing Carbide-Tipped Drill Bits for Masonry and Concrete

Lift dust and debris out of the hole more quickly than standard masonry bits

4 products

Drill Bits for Paper and Fabric

Razor-sharp cutting for binding documents and sample swatches

1 product

Smooth-Finish Drill Bits for Wood

Multiple teeth cut away large amounts of material to bore clean, flat-bottom holes

3 products

Carbide Drill Bits for Sheet Metal

The hardest and most wear-resistant bits make shallow cuts without snagging and deforming thin metal and tubing

1 product

Carbide-Tipped Smooth-Finish Drill Bits for Wood

Stay sharp longer on tough materials, such as plywood and hard woods.

3 products

Drill Bits for Glass and Ceramic

Smoothly drill fragile materials so they don't chip or crack

3 products

Other Products

Drill Bit Guides

Drill precise holes without building a fixture

2 products

Drill Stops

Limit how far bits can drill to create identical hole depths every time

2 products

Tap and Drill Bit Stands

Organize taps and drill bits by size

1 product

Drill Bit Sharpeners

Sharpen steel, high-speed steel, cobalt steel, and carbide spiral bits

3 products

Drill Bit Inserts

Pair with compatible drill bit bodies to precisely drill multiple holes

4 products

Drill Bit Size Gauges

Match your drill bit to one of the holes to confirm its size

1 product

Steel

Strong, machinable, and weldable—all with material certificates for traceability

4 products

Counterbores

Enlarge the top of a hole to install socket and hex head screws flush with the surface

2 products

Drill Bushings

Fit in holes to guide drill bits and other cutting tools for precise and repeatable holes and cuts

2 products