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System of Measurement System of Measurement |
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Drill Bit Size Drill Bit Size | Show |
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Drill Bit Size Drill Bit Size | Hide |
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Decimal Size Equivalent Decimal Size Equivalent |
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For Use On For Use On |
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Length Class Length Class |
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Reduced Shank Length |
Flute Direction Flute Direction |
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Right Hand |
Individual/Set Individual/Set |
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Point Style Point Style |
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Standard |
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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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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Bit Style Bit Style |
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![]() | Spiral Flute |
Maximum Drilling Depth Maximum Drilling Depth |
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Overall Length Overall Length |
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Point Angle Point Angle |
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Shank Size Shank Size |
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Finish Finish |
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Material Material |
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Shank Type Shank Type |
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![]() | Reduced Round |
Drill Bit Decimal Size Equivalents
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About Drill Bits
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1/2" Diameter Reduced-Shank Drill Bits

Black Oxide

Black Oxide with Flats on Shank
The shank has a smaller diameter than the tip, allowing you to drill large holes with machines that have small-capacity chucks. Also known as Silver and Deming bits, they have a 1/2” diameter shank.
Drill bits with flats on shank have three flat sides to prevent the bit from slipping in the drill chuck.
For technical drawings and 3-D models, click on a part number.