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About Counterbores
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Create flat-bottomed holes, so your screw heads sit flush, recessed, or slightly raised.
Drill-Bit Counterbores for Wood
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Shown with Drill Bit (Sold Separately) |
Drill and counterbore holes of different depths without changing tools. These counterbores move along the drill bit (sold separately) and lock into place with set screws to match the length of the screw you're installing.
Steel
 |
 |
Counterbore Collars |
Counterbores | Counterbore Collars | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Uncoated | |||||||||||
Body Dia. | Overall Lg. | No. of Flutes | For Drill Bit Size | Each | OD | Wd. | Each | ||||
| 5/8" | 1" | 4 | 3/16" | 3105A11 | 000000 | 7/8" | 1/4" | 2903A17 | 00000 | ||
| 5/8" | 1" | 4 | 1/4" | 3105A21 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 3/4" | 1" | 4 | 1/4" | 3105A12 | 00000 | 1" | 1/4" | 2903A18 | 0000 | ||
| 3/4" | 1 1/8" | 4 | 5/16" | 3105A13 | 00000 | 1" | 1/4" | 2903A18 | 0000 | ||
| 7/8" | 1 1/4" | 4 | 3/8" | 3105A14 | 00000 | 1 1/8" | 1/4" | 2903A19 | 0000 | ||
| 1" | 1 3/8" | 4 | 7/16" | 3105A15 | 00000 | 1 1/4" | 5/16" | 2903A21 | 0000 | ||
| 1 1/8" | 1 1/2" | 4 | 1/2" | 3105A16 | 00000 | 1 3/8" | 5/16" | 2903A32 | 0000 | ||
| 1 1/4" | 1 5/8" | 4 | 9/16" | 3105A22 | 00000 | 1 1/2" | 3/8" | 2903A23 | 0000 | ||
Quick-Change Hex Drill-Bit Counterbores for Wood
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Shown with Optional Drill Stop (Sold Separately) |
Pop the 1/4" hex shank into a drill chuck, power screwdriver, or impact driver to drill and counterbore a hole in a single step. These counterbores move along the included drill bit and lock into place with set screws to match the length of the screw you're installing.
Steel
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Stops |
Stops—Attach with a set screw to stop the counterbore at the exact depth you need. These stops have a ring on the end that rotates separately from the body. When the ring touches your workpiece, it stops spinning to prevent scratches and dents. An opening in the side clears chips from the hole as you cut.
Counterbores | Stops | Replacement Drill Bits | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Shank | Black Oxide | |||||||||||||
Body Dia. | Overall Lg. | Size | Type | No. of Flutes | Max. Hole Drilling Dp. | Drill Bit Size | Each | Each | Each | |||||
| 3/8" | 2 7/8" | 1/4" | Quick-Change Hex | 3 | 1.1" | 1/8" | 3438N21 | 000000 | 3438N11 | 000000 | 2908A35 | 00000 | ||
| 1/2" | 2 7/8" | 1/4" | Quick-Change Hex | 3 | 1.2" | 1/8" | 3438N22 | 00000 | 3438N11 | 00000 | 2908A35 | 0000 | ||
| 5/8" | 3 1/4" | 1/4" | Quick-Change Hex | 3 | 1.3" | 3/16" | 3438N23 | 00000 | ——— | 0 | 2908A39 | 0000 | ||
| 5/8" | 3 21/32" | 1/4" | Quick-Change Hex | 3 | 2.7" | 1/4" | 3438N311 | 00000 | ——— | 0 | 2908A44 | 0000 | ||
| 3/4" | 3 1/4" | 1/4" | Quick-Change Hex | 3 | 1.3" | 3/16" | 3438N24 | 00000 | ——— | 0 | 2908A39 | 0000 | ||
| 3/4" | 3 5/8" | 1/4" | Quick-Change Hex | 3 | 1.6" | 1/4" | 3438N25 | 00000 | ——— | 0 | 2908A44 | 0000 | ||
| 3/4" | 3 31/32" | 1/4" | Quick-Change Hex | 3 | 3" | 5/16" | 3438N312 | 00000 | ——— | 0 | 2908A48 | 00000 | ||
| 1" | 4 11/16" | 1/4" | Quick-Change Hex | 3 | 3.7" | 7/16" | 3438N313 | 00000 | ——— | 0 | 2908A57 | 00000 | ||
Drill-Bit Counterbore Sets for Wood
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Body Dia. | No. of Pieces | Container Type | Each | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Uncoated Steel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3/46", 1/4", 5/16", 3/8", 7/16", 1/2" | 6 | Wood Stand | 3105A31 | 0000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
