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About Counterbores
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Create flat-bottomed holes, so your screw heads sit flush, recessed, or slightly raised.
Quick-Change Hex Drill-Bit Counterbores for Wood
 |
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
 |  |
Depth Stops |
Counterbores | Depth Stops | Replacement Drill Bits | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Shank | Black Oxide | ||||||||||||||
Body Dia. | Drill Bit Size | Overall Lg. | Size | Type | No. of Flutes | Max. Hole Drilling Dp. | Mfr. | Each | Each | Each | |||||
| 3/8" | 1/8" | 2 7/8" | 1/4" | Quick-Change Hex | 3 | 1.1" | Make It Snappy Tools | 3438N21 | 000000 | 3438N11 | 000000 | 2908A35 | 00000 | ||
| 1/2" | 1/8" | 2 7/8" | 1/4" | Quick-Change Hex | 3 | 1.2" | Make It Snappy Tools | 3438N22 | 00000 | 3438N11 | 00000 | 2908A35 | 0000 | ||
| 5/8" | 3/16" | 3 1/4" | 1/4" | Quick-Change Hex | 3 | 1.3" | Make It Snappy Tools | 3438N23 | 00000 | ——— | 0 | 2908A39 | 0000 | ||
| 5/8" | 1/4" | 3 21/32" | 1/4" | Quick-Change Hex | 3 | 2.7" | Make It Snappy Tools | 3438N311 | 00000 | ——— | 0 | 2908A44 | 0000 | ||
| 3/4" | 3/16" | 3 1/4" | 1/4" | Quick-Change Hex | 3 | 1.3" | Make It Snappy Tools | 3438N24 | 00000 | ——— | 0 | 2908A39 | 0000 | ||
| 3/4" | 1/4" | 3 5/8" | 1/4" | Quick-Change Hex | 3 | 1.6" | Make It Snappy Tools | 3438N25 | 00000 | ——— | 0 | 2908A44 | 0000 | ||
| 3/4" | 5/16" | 3 31/32" | 1/4" | Quick-Change Hex | 3 | 3" | Make It Snappy Tools | 3438N312 | 00000 | ——— | 0 | 2908A48 | 00000 | ||
| 1" | 7/16" | 4 11/16" | 1/4" | Quick-Change Hex | 3 | 3.7" | Make It Snappy Tools | 3438N313 | 00000 | ——— | 0 | 2908A57 | 00000 | ||
Drill-Bit Counterbores for Wood
 |
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
 |
|
Depth Stops |
Counterbores | Depth Stops | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Uncoated | ||||||||||
Body Dia. | Drill Bit Size | Overall Lg. | No. of Flutes | Mfr. | Each | Each | ||||
| 5/8" | 3/16" | 1" | 4 | W. L. Fuller | 3105A11 | 000000 | 2903A17 | 00000 | ||
| 5/8" | 1/4" | 1" | 4 | W. L. Fuller | 3105A21 | 00000 | 2903A17 | 0000 | ||
| 3/4" | 1/4" | 1" | 4 | W. L. Fuller | 3105A12 | 00000 | 2903A18 | 0000 | ||
| 3/4" | 5/16" | 1 1/8" | 4 | W. L. Fuller | 3105A13 | 00000 | 2903A18 | 0000 | ||
| 7/8" | 3/8" | 1 1/4" | 4 | W. L. Fuller | 3105A14 | 00000 | 2903A19 | 0000 | ||
| 1" | 7/16" | 1 3/8" | 4 | W. L. Fuller | 3105A15 | 00000 | 2903A21 | 0000 | ||
| 1 1/8" | 1/2" | 1 1/2" | 4 | W. L. Fuller | 3105A16 | 00000 | 2903A32 | 0000 | ||
| 1 1/4" | 9/16" | 1 5/8" | 4 | W. L. Fuller | 3105A22 | 00000 | 2903A23 | 0000 | ||
Drill-Bit Counterbore Sets for Wood
 |
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.
Body Dia. | For Drill Bit Size | No. of Pieces | Container Type | Mfr. | Each | |||
|---|---|---|---|---|---|---|---|---|
Uncoated Steel | ||||||||
| 5/8", 3/4", 7/8", 1", 1 1/8" | 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" | 6 | Wood Stand | W. L. Fuller | 3105A31 | 0000000 | ||
Fast-Cutting Smooth-Finish Drill-Bit Counterbores for Wood
 |
Carbon Steel
Uncoated | ||||||||
|---|---|---|---|---|---|---|---|---|
Body Dia. | Overall Lg. | For Shank Dia. | For Min. Drill Bit Cutting Dia. | Mfr. | Each | |||
| 1 1/8" | 1" | 1/2" | 1/2" | Stern | 2921A12 | 000000 | ||
| 1 1/4" | 1" | 1/2" | 1/2" | Stern | 2921A13 | 00000 | ||
| 1 3/8" | 1" | 1/2" | 1/2" | Stern | 2921A14 | 00000 | ||
| 1 1/2" | 1" | 1/2" | 1/2" | Stern | 2921A15 | 00000 | ||
| 1 3/4" | 1" | 1/2" | 1/2" | Stern | 2921A17 | 000000 | ||
| 2" | 1 1/4" | 1/2" | 1/2" | Stern | 2921A19 | 000000 | ||
| 2 1/2" | 1 1/4" | 1/2" | 1/2" | Stern | 2921A24 | 000000 | ||
