Shank Type Shank Type |
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 | Round |
 | Hex |
 | Quick- Change Hex |
 | SDS Plus |
For Drill Bit Shank Type For Drill Bit Shank Type |
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 | Round |
 | Hex |
 | SDS Plus |
| Quick- Change Hex |
For Drill Bit Shank Size For Drill Bit Shank Size |
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For Drill Bit Size For Drill Bit Size |
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For Drill Bit System of Measurement For Drill Bit Systemof Measurement |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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For Drill Bit Size Decimal Equivalent For Drill Bit SizeDecimal Equivalent |
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For Maximum Drill Torque For Maximum Drill Torque |
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Extensions for Round-Shank Drill Bits
One Piece
Two Piece
Attach to the shank of a drill bit to extend its reach.
To attach one-piece extensions, insert a drill bit into the extension and tighten the knurled collar.
To attach two-piece extensions, insert a drill bit into the collet, then thread the collet onto the extension and tighten with a wrench.
For Drill Bit | ||||||||
|---|---|---|---|---|---|---|---|---|
| Size | Size Decimal Equivalent | Shank Size | Shank Size | Overall Lg. | OD | Material | Each | |
Inch | ||||||||
One Piece | ||||||||
| 1/64" | 0.0156" | 1/64" | 1/8" | 4" | 1/8" | Steel | 00000000 | 000000 |
| 1/64" | 0.0156" | 1/64" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 1/32" | 0.0313" | 1/32" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 1/32" | 0.0313" | 1/32" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 3/64" | 0.0469" | 3/64" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 1/16" | 0.0625" | 1/16" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
Two Piece | ||||||||
| 1/16" | 0.0625" | 1/16" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 1/16" | 0.0625" | 1/16" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 5/64" | 0.0781" | 5/64" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 5/64" | 0.0781" | 5/64" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 3/32" | 0.0938" | 3/32" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 3/32" | 0.0938" | 3/32" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 7/64" | 0.1094" | 7/64" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 7/64" | 0.1094" | 7/64" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 1/8" | 0.1250" | 1/8" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 1/8" | 0.1250" | 1/8" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 9/64" | 0.1406" | 9/64" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 9/64" | 0.1406" | 9/64" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 5/32" | 0.1563" | 5/32" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 5/32" | 0.1563" | 5/32" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 11/64" | 0.1719" | 11/64" | 1/4" | 4 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 11/64" | 0.1719" | 11/64" | 1/4" | 9 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 3/16" | 0.1875" | 3/16" | 1/4" | 4 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 3/16" | 0.1875" | 3/16" | 1/4" | 9 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 13/64" | 0.2031" | 13/64" | 1/4" | 4 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 13/64" | 0.2031" | 13/64" | 1/4" | 9 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 7/32" | 0.2188" | 7/32" | 1/4" | 4 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 7/32" | 0.2188" | 7/32" | 1/4" | 9 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 15/64" | 0.2344" | 15/64" | 1/4" | 4 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 15/64" | 0.2344" | 15/64" | 1/4" | 9 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 1/4" | 0.2500" | 1/4" | 1/4" | 4 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 1/4" | 0.2500" | 1/4" | 1/4" | 9 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 1/4" | 0.2500" | 1/4" | 3/8" | 4 1/2" | 9/16" | Steel | 00000000 | 00000 |
| 1/4" | 0.2500" | 1/4" | 3/8" | 9 1/2" | 9/16" | Steel | 00000000 | 00000 |
| 17/64" | 0.2656" | 17/64" | 3/8" | 4 1/2" | 9/16" | Steel | 00000000 | 00000 |
| 17/64" | 0.2656" | 17/64" | 3/8" | 9 1/2" | 9/16" | Steel | 00000000 | 00000 |
| 9/32" | 0.2813" | 9/32" | 3/8" | 4 1/2" | 9/16" | Steel | 00000000 | 00000 |
| 9/32" | 0.2813" | 9/32" | 3/8" | 9 1/2" | 9/16" | Steel | 00000000 | 00000 |
| 19/64" | 0.2969" | 19/64" | 3/8" | 4 1/2" | 9/16" | Steel | 00000000 | 00000 |
| 19/64" | 0.2969" | 19/64" | 3/8" | 9 1/2" | 9/16" | Steel | 00000000 | 00000 |
| 5/16" | 0.3125" | 5/16" | 3/8" | 4 1/2" | 9/16" | Steel | 00000000 | 00000 |
| 5/16" | 0.3125" | 5/16" | 3/8" | 9 1/2" | 9/16" | Steel | 00000000 | 00000 |
Wire Gauge | ||||||||
One Piece | ||||||||
| 80 ga | 0.0135" | 0.014" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 80 ga | 0.0135" | 0.014" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 79 ga | 0.0145" | 0.015" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 79 ga | 0.0145" | 0.015" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 78 ga | 0.0160" | 0.016" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 78 ga | 0.0160" | 0.016" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 77 ga | 0.0180" | 0.018" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 77 ga | 0.0180" | 0.018" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 76 ga | 0.0200" | 0.02" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 76 ga | 0.0200" | 0.02" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 75 ga | 0.0210" | 0.021" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 75 ga | 0.0210" | 0.021" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 74 ga | 0.0225" | 0.023" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 74 ga | 0.0225" | 0.023" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 73 ga | 0.0240" | 0.024" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 73 ga | 0.0240" | 0.024" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 72 ga | 0.0250" | 0.025" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 72 ga | 0.0250" | 0.025" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 71 ga | 0.0260" | 0.026" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 71 ga | 0.0260" | 0.026" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 70 ga | 0.0280" | 0.028" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 70 ga | 0.0280" | 0.028" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 69 ga | 0.0292" | 0.029" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 69 ga | 0.0292" | 0.029" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 68 ga | 0.0310" | 0.031" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 68 ga | 0.0310" | 0.031" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 67 ga | 0.0320" | 0.032" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 67 ga | 0.0320" | 0.032" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 66 ga | 0.0330" | 0.033" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 66 ga | 0.0330" | 0.033" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 65 ga | 0.0350" | 0.035" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 65 ga | 0.0350" | 0.035" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 64 ga | 0.0360" | 0.036" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 64 ga | 0.0360" | 0.036" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 63 ga | 0.0370" | 0.037" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 63 ga | 0.0370" | 0.037" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 62 ga | 0.0380" | 0.038" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 62 ga | 0.0380" | 0.038" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 61 ga | 0.0390" | 0.039" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 61 ga | 0.0390" | 0.039" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 60 ga | 0.0400" | 0.04" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 60 ga | 0.0400" | 0.04" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 59 ga | 0.0410" | 0.041" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 59 ga | 0.0410" | 0.041" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 58 ga | 0.0420" | 0.042" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 58 ga | 0.0420" | 0.042" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 57 ga | 0.0430" | 0.043" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 57 ga | 0.0430" | 0.043" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 56 ga | 0.0465" | 0.047" | 1/8" | 4" | 1/8" | Steel | 00000000 | 00000 |
| 56 ga | 0.0465" | 0.047" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 55 ga | 0.0520" | 0.052" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 54 ga | 0.0550" | 0.055" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
| 53 ga | 0.0595" | 0.06" | 3/16" | 4" | 3/16" | Steel | 00000000 | 00000 |
Two Piece | ||||||||
| 43 ga | 0.0890" | 0.089" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 43 ga | 0.0890" | 0.089" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 40 ga | 0.0980" | 0.098" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 40 ga | 0.0980" | 0.098" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 30 ga | 0.1285" | 0.129" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 30 ga | 0.1285" | 0.129" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 21 ga | 0.1590" | 0.159" | 1/4" | 4 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 21 ga | 0.1590" | 0.159" | 1/4" | 9 1/2" | 5/16" | Steel | 00000000 | 00000 |
| 11 ga | 0.1910" | 0.191" | 1/4" | 4 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 11 ga | 0.1910" | 0.191" | 1/4" | 9 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 10 ga | 0.1935" | 0.194" | 1/4" | 4 1/2" | 7/16" | Steel | 00000000 | 00000 |
| 10 ga | 0.1935" | 0.194" | 1/4" | 9 1/2" | 7/16" | Steel | 00000000 | 00000 |
Extensions for Hex-Shank Drill Bits
Attach to the shank of a drill bit to extend its reach. Tighten the set screws to secure the drill bit in the extension.
For technical drawings and 3-D models, click on a part number.
| For Drill Bit Shank Size | Shank Size | Overall Lg. | OD | Material | Includes | Each | |
One Piece | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 1/4" | 6" | 1/2" | Steel | Hex L-Key | 0000000 | 00000 |
| 1/4" | 1/4" | 12" | 1/2" | Steel | Hex L-Key | 0000000 | 0000 |
| 5/16" | 5/16" | 18" | 11/16" | Steel | Hex L-Key | 0000000 | 00000 |
| 5/16" | 5/16" | 24" | 11/16" | Steel | Hex L-Key | 0000000 | 00000 |
| 7/16" | 7/16" | 5 1/2" | 3/4" | Steel | Hex L-Key | 0000000 | 00000 |
| 7/16" | 7/16" | 12" | 3/4" | Steel | Hex L-Key | 0000000 | 00000 |
| 7/16" | 7/16" | 18" | 1 1/16" | Steel | Hex L-Key | 0000000 | 00000 |
| 7/16" | 7/16" | 24" | 7/8" | Steel | Hex L-Key | 0000000 | 00000 |
Adjustable-Length Quick-Change Extensions for Hex-Shank Drill Bits
Shown Fully Extended
Adjust these extensions to the desired length. They have a quick-change mechanism for fast bit changes. Attach to the shank of a drill bit to extend its reach.
Extensions for SDS-Plus-Shank Drill Bits
SDS-Plus Shank
SDS-Plus shanks have two deep slots and two shallow slots for use with SDS-Plus-drive rotary hammers. These extensions have a quick-change mechanism for fast bit changes. Attach to the shank of a drill bit to extend its reach.
Flexible Bit Adapters
Bend these adapters up to 90° to access hard-to-reach fasteners. Use hex-shank bits (also known as insert bits) in drills and powered screwdrivers.