Drill Bit Decimal Size Equivalents
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About Reamers
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About Drill Bits
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Hole-Enlarging Drill Bits
Enlarge existing holes without changing their depth. These bits have flutes with a right-hand spiral and a right-hand cut. The flutes pull chips upward as they cut for use in blind holes.
For technical drawings and 3-D models, click on a part number.
Lg. | Direction | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Reamer Size | Drill Bit Size | For Min. Hole Dia. | Shank Dia. | Max. Drilling Dp. | Flute | Overall | Number of Flutes | Flute Style | Spiral | Cut | Cutting Dia. Tolerance | For Use On | Each | |
Black and Gold Oxide Tool Steel | ||||||||||||||
| 3/8" | 3/8" | 1/4" | 3/8" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 000000 |
| 1/2" | 1/2" | 5/16" | 1/2" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 9/16" | 9/16" | 3/8" | 1/2" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 5/8" | 5/8" | 25/64" | 1/2" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 11/16" | 11/16" | 7/16" | 1/2" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 3/4" | 3/4" | 15/32" | 1/2" | 1 3/4" | 1 7/8" | 4 5/16" | 4 | Spiral | Right Hand | Right Hand | -0.001" to 0" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
Hole-Enlarging Drill-Bit Sets
Enlarge existing holes without changing the depth. These bits have flutes with a right-hand spiral and a right-hand cut. The flutes pull chips upward as they cut for use in blind holes.
For technical drawings and 3-D models, click on a part number.
Direction | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Sizes Included  | Number of Pieces | Flute Style | Spiral | Cut | Container Type | For Use On | System of Measurement | Each | |
Black and Gold Oxide Tool Steel | ||||||||||
| 1/4", 5/16", 3/8", 25/64", 15/32", 1/2", 5/8", 3/4" | 1/4", 5/16", 25/64", and 15/32" Hole-Starting Bits; 3/8", 1/2", 5/8", and 3/4" Hole-Enlarging Bits | 8 | Spiral | Right Hand | Right Hand | Metal Case | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | Inch | 00000000 | 0000000 |
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 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 |
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.
Hinge Mortise Router Bits
Use these bits to create large, shallow recesses in wood, such as mortises for hinge leaves. They're made of carbide-tipped high-speed steel for a long tool life and fast cutting speeds. They do not have a pilot, so guide your router along a straight edge when hand routing to ensure straight, accurate cuts.
For technical drawings and 3-D models, click on a part number.