Drill Bit Size Drill Bit Size |
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Bit Style Bit Style |
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 | Spear |
 | Hollow |
 | Spiral Flute |
Decimal Size Equivalent Decimal Size Equivalent |
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Individual/Set Individual/Set |
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Bit ID Bit ID |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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Component Component |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Drill Bit Decimal Size Equivalents
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About Drill Bits
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About Masonry Drill Bits
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Drill Bits for Stone, Granite, and Slate
Multiple cutting edges on the tip allow these bits to drill quickly through natural stone, granite, and other hard, abrasive material.
Drill bits with flats on shank have three flat sides to prevent the bit from slipping in the drill chuck.
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Features | Each | |
Inch | |||||||||
Titanium-Nitride (TiN) Coated Carbide-Tipped Steel | |||||||||
| 1/8" | 0.125" | 2" | 2" | Round | 1/8" | Standard | __ | 000000 | 00000 |
| 3/16" | 0.1875" | 2" | 2" | Round | 3/16" | Standard | __ | 000000 | 0000 |
| 1/4" | 0.25" | 2 1/4" | 2.25" | Round | 1/4" | Standard | __ | 000000 | 00000 |
| 5/16" | 0.3125" | 2" | 2" | Round | 1/4" | Standard | __ | 000000 | 00000 |
| 3/8" | 0.375" | 3 3/4" | 3.75" | Round | 3/8" | Standard | Flats on Shank | 000000 | 00000 |
| 1/2" | 0.5" | 3 3/4" | 3.75" | Round | 3/8" | Standard | Flats on Shank | 000000 | 00000 |
Core Drill Bits for Glass and Ceramic
Reduce the chance of chipping and cracking when drilling in glass and ceramic. These hollow bits are diamond-coated for long life and fast cutting. They are for use in drill presses only and require an adapter (sold separately). Attach the threaded nut to the adapter, then install the adapter into the chuck on a drill press. Coolant, such as water, is required when drilling with these bits. The size listed is the bit's OD.
Drill press adapters attach to a water line, which acts as coolant during drilling, and include an on/off valve. Both adapters work with all of these drill bits, but choose the shank size that fits your application.
For technical drawings and 3-D models, click on a part number.
| Drill Bit Size | Decimal Size Equivalent | Bit ID | Overall Lg. | Max. Drilling Dp. | Diamond Tip Lg. | Diamond Grit | Recommended Operating Speed, rpm | Each | |
Diamond-Coated Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 3/32" | 0.0938" | 0.043" | 3 1/2" | 2" | 1/8" | 100 | 1,800-2,400 | 0000000 | 0000000 |
| 1/8" | 0.125" | 0.075" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 5/32" | 0.1563" | 0.106" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 3/16" | 0.1875" | 0.137" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 7/32" | 0.2188" | 0.169" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 1/4" | 0.25" | 0.2" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 9/32" | 0.2813" | 0.231" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 5/16" | 0.3125" | 0.262" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 3/8" | 0.375" | 0.325" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 7/16" | 0.4375" | 0.387" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 1/2" | 0.5" | 0.446" | 3 1/2" | 2" | 1/4" | 100 | 1,800-2,400 | 0000000 | 000000 |
| 9/16" | 0.5625" | 0.504" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
| 5/8" | 0.625" | 0.562" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
| 3/4" | 0.75" | 0.692" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
| 7/8" | 0.875" | 0.817" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
| 1" | 1" | 0.94" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
| 1 1/4" | 1.25" | 1.19" | 3 1/2" | 2" | 1/4" | 100 | 1,250-1,800 | 0000000 | 000000 |
Round- and Hex-Shank Masonry Drill Bits for Hammer Drills
Drill holes using simultaneous rotary and hammering action to break masonry material into tiny granules. These bits drill faster and penetrate materials with less pressure than rotary-only bits. Also known as percussion or impact bits.
Serrated-point drill bits deliver faster, cooler cutting as well as longer life than standard-point masonry drill bits.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Specifications Met | For Use On | Each | |
Inch—Serrated Point | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
| 1/8" | 0.125" | 3" | 1.88" | Round | 1/8" | ANSI B212.15 | Masonry, Concrete | 00000000 | 000000 |
| 3/16" | 0.1875" | 4" | 2.38" | Round | 3/16" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 3/16" | 0.1875" | 6" | 4.5" | Round | 3/16" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 3/16" | 0.1875" | 8" | 6" | Round | 3/16" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 1/4" | 0.25" | 4" | 2.25" | Round | 1/4" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 1/4" | 0.25" | 6" | 3.75" | Round | 1/4" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 1/4" | 0.25" | 8" | 6" | Round | 1/4" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 5/16" | 0.3125" | 4 1/4" | 2.5" | Round | 1/4" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 5/16" | 0.3125" | 6" | 4" | Round | 1/4" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 3/8" | 0.375" | 6" | 4" | Round | 3/8" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 7/16" | 0.4375" | 6" | 4" | Round | 3/8" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 1/2" | 0.5" | 6" | 4" | Round | 3/8" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 5/8" | 0.625" | 6" | 4" | Round | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 11/16" | 0.6875" | 6" | 4" | Round | 1/2" | ANSI B212.15 | Masonry, Concrete | 00000000 | 00000 |
| 3/4" | 0.75" | 6" | 4" | Round | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 7/8" | 0.875" | 6" | 4" | Round | 1/2" | ANSI B212.15 | Masonry, Concrete | 00000000 | 00000 |
| 1" | 1" | 6" | 4" | Round | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
Round- and Hex-Shank Masonry Drill Bit Sets for Hammer Drills
Drill holes using simultaneous rotary and hammering action to break masonry material into tiny granules. These bits drill faster and penetrate material with less pressure than rotary-only bits. Also known as percussion or impact bits.
Serrated-point drill bits deliver faster, cooler cutting as well as longer life than standard-point masonry drill bits.
For technical drawings and 3-D models, click on a part number.
| Number of Pieces | Drill Bit Sizes Included | Shank Type | Point Style | Specifications Met | For Use On | Each | |
Inch | |||||||
|---|---|---|---|---|---|---|---|
Uncoated Carbide-Tipped Steel | |||||||
| 5 | 3/16"; 1/4"; 5/16"; 3/8"; 1/2" | Round | Serrated | ANSI B212.15 | Masonry, Concrete | 0000000 | 000000 |