Drill Bit Decimal Size Equivalents
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About Drill Bits
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Fast-Cutting Smooth-Finish Drill Bits for Wood
Multiple outlining teeth bore clean, flat-bottom holes without chipping or splintering your surface—even when cutting across the grain. These bits are excellent for boring straight holes, overlapping holes, and holes on close centers in soft wood, veneer, and laminates. The center guide point prevents the bit from wandering. Also known as multispur bits or Forstner 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 | Point Style | Each | |
Inch | ||||||||
Uncoated Steel | ||||||||
| 1/4" | 0.25" | 4" | 2" | Round | 1/2" | Standard | 0000000 | 000000 |
| 5/16" | 0.3125" | 4" | 2" | Round | 1/2" | Standard | 0000000 | 00000 |
| 3/8" | 0.375" | 4" | 2" | Round | 1/2" | Standard | 0000000 | 00000 |
| 7/16" | 0.4375" | 4" | 2" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1/2" | 0.5" | 5" | 3" | Round | 1/2" | Standard | 0000000 | 00000 |
| 9/16" | 0.5625" | 5" | 3" | Round | 1/2" | Standard | 0000000 | 00000 |
| 5/8" | 0.625" | 5" | 3" | Round | 1/2" | Standard | 0000000 | 00000 |
| 11/16" | 0.6875" | 5" | 3" | Round | 1/2" | Standard | 0000000 | 00000 |
| 3/4" | 0.75" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 13/16" | 0.8125" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 7/8" | 0.875" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 15/16" | 0.9375" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1" | 1" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 1/16" | 1.0625" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 1/8" | 1.125" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 3/16" | 1.1875" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 1/4" | 1.25" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 5/16" | 1.3125" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 3/8" | 1.375" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 7/16" | 1.4375" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 1/2" | 1.5" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 9/16" | 1.5625" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 5/8" | 1.625" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 11/16" | 1.6875" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 3/4" | 1.75" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 13/16" | 1.8125" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 7/8" | 1.875" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 1 15/16" | 1.9375" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2" | 2" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 1/8" | 2.125" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 1/4" | 2.25" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 3/8" | 2.375" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 1/2" | 2.5" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 3/4" | 2.75" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 00000 |
| 2 7/8" | 2.875" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 000000 |
| 3" | 3" | 6" | 4" | Round | 1/2" | Standard | 0000000 | 000000 |
Smooth-Finish Drill Bits for Wood
Bore clean, flat bottom holes in soft wood, veneer, and laminates. The center guide point prevents the bit from wandering. Also known as Forstner bits.
Carbide-tipped steel drill bits maintain their sharp edges longer than alloy tool steel bits, and can cut through tough, abrasive material such as plywood, hard wood, and composites.
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 | Point Style | Each | |
Inch | ||||||||
Uncoated Carbide-Tipped Steel | ||||||||
| 1/4" | 0.25" | 3 1/2" | 3" | Round | 5/32" | Standard | 0000000 | 000000 |
| 3/8" | 0.375" | 3 1/2" | 3" | Round | 1/4" | Standard | 0000000 | 00000 |
| 1/2" | 0.5" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 5/8" | 0.625" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 3/4" | 0.75" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 7/8" | 0.875" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 1" | 1" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 1 1/8" | 1.125" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 1 1/4" | 1.25" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 1 3/8" | 1.375" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 1 1/2" | 1.5" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 1 5/8" | 1.625" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 1 3/4" | 1.75" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 1 7/8" | 1.875" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 2" | 2" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
| 2 1/8" | 2.125" | 3 1/2" | 3" | Round | 3/8" | Standard | 0000000 | 00000 |
Uncoated Alloy Tool Steel | ||||||||
| 1/4" | 0.25" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 5/16" | 0.3125" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 3/8" | 0.375" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 7/16" | 0.4375" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 1/2" | 0.5" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 9/16" | 0.5625" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 5/8" | 0.625" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 11/16" | 0.6875" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 3/4" | 0.75" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 13/16" | 0.8125" | 3 1/2" | 3" | Round | 5/16" | Standard | 0000000 | 00000 |
| 7/8" | 0.875" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 15/16" | 0.9375" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1" | 1" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1 1/16" | 1.0625" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1 1/8" | 1.125" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1 3/16" | 1.1875" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1 1/4" | 1.25" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1 5/16" | 1.3125" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1 3/8" | 1.375" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1 1/2" | 1.5" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1 5/8" | 1.625" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1 3/4" | 1.75" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 1 7/8" | 1.875" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 2" | 2" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
| 2 1/8" | 2.125" | 3 1/2" | 3" | Round | 13/32" | Standard | 0000000 | 00000 |
Metric | ||||||||
Uncoated Alloy Tool Steel | ||||||||
| 26.0 mm | 1.0236" | 89mm | 76.2mm | Round | 10mm | Standard | 000000 | 00000 |
| 35.0 mm | 1.378" | 89mm | 76.2mm | Round | 10mm | Standard | 000000 | 00000 |
Fast-Cutting Drill Bits for Wood
The screw point draws the bit in, quickly boring holes without applying pressure.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||
|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Type | Size | Point Style | Each | |
Inch | |||||||
Black-Oxide Steel | |||||||
| 1" | 1" | 5" | Quick-Change Hex | 7/16" | Screw | 0000000 | 000000 |
| 1 1/8" | 1.125" | 5" | Quick-Change Hex | 7/16" | Screw | 0000000 | 00000 |
| 1 1/4" | 1.25" | 5" | Quick-Change Hex | 7/16" | Screw | 0000000 | 00000 |
| 1 3/8" | 1.375" | 5" | Quick-Change Hex | 7/16" | Screw | 0000000 | 00000 |
| 1 1/2" | 1.5" | 5" | Quick-Change Hex | 7/16" | Screw | 0000000 | 00000 |
| 1 3/4" | 1.75" | 5 1/8" | Quick-Change Hex | 7/16" | Screw | 0000000 | 00000 |
| 2" | 2" | 5 1/8" | Quick-Change Hex | 7/16" | Screw | 0000000 | 00000 |
| 2 1/8" | 2.125" | 5 1/8" | Quick-Change Hex | 7/16" | Screw | 0000000 | 00000 |
| 2 1/4" | 2.25" | 5 1/8" | Quick-Change Hex | 7/16" | Screw | 0000000 | 00000 |
| 2 9/16" | 2.5625" | 5 1/8" | Quick-Change Hex | 7/16" | Screw | 0000000 | 00000 |
| 3" | 3" | 6 1/4" | Quick-Change Hex | 1/2" | Screw | 0000000 | 000000 |
| 3 5/8" | 3.625" | 6 1/4" | Quick-Change Hex | 1/2" | Screw | 0000000 | 000000 |
| 4 1/8" | 4.125" | 6 1/4" | Quick-Change Hex | 1/2" | Screw | 0000000 | 000000 |
| 4 5/8" | 4.625" | 6 1/4" | Quick-Change Hex | 1/2" | Screw | 0000000 | 000000 |
Fast-Cutting Drill Bit Sets for Wood
The screw point draws the bit in, quickly boring holes without applying pressure.
For technical drawings and 3-D models, click on a part number.
| Number of Pieces | Drill Bit Sizes Included | Shank Type | Point Style | For Use On | Includes | Each | |
Inch | |||||||
|---|---|---|---|---|---|---|---|
Black-Oxide Steel | |||||||
| 8 | 1 1/8"; 1 1/4"; 1 1/2"; 1 3/4"; 1"; 2 1/8"; 2 9/16" | Quick-Change Hex | Screw | Wood | 5 1/2" Long Extension | 0000000 | 0000000 |
Smooth-Finish Drill Bit Sets for Wood
Bore clean, flat bottom holes in soft wood, veneer, and laminates. The center guide point prevents the bit from wandering. Also known as Forstner bits.
For technical drawings and 3-D models, click on a part number.