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About Counterbores
Create flat-bottomed holes, so your screw heads sit flush, recessed, or slightly raised.
Drill-Point Counterbores
Skip a step when installing screws in metal. With a sharp point on the tip, these counterbores drill a pilot hole topped with a flat recess for the screw head. That's faster and more accurate than switching to a counterbore in between passes with your drill bit.
High-Speed Steel
 |
Durable and wear resistant, these counterbores make accurate cuts in most materials without chipping or cracking.
Shank | Uncoated | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | Body Dia. | Overall Lg. | Dia. | Type | No. of Flutes | Max. Hole Drilling Dp. | Each | |||
| No. 5 | 0.220" | 1 7/32" | 1/4" | Round | 2 | 0.25" | 00000000 | 000000 | ||
| No. 5 | 0.220" | 2" | 1/4" | Round | 2 | 0.414" | 000000000 | 00000 | ||
| No. 6 | 0.242" | 1 7/32" | 1/4" | Round | 2 | 0.25" | 00000000 | 00000 | ||
| No. 6 | 0.242" | 2" | 1/4" | Round | 2 | 0.45" | 000000000 | 00000 | ||
| No. 8 | 0.290" | 1 15/32" | 5/16" | Round | 2 | 0.281" | 00000000 | 00000 | ||
| No. 8 | 0.290" | 2 1/4" | 3/8" | Round | 2 | 0.534" | 000000000 | 00000 | ||
| No. 10 | 0.332" | 1 1/2" | 5/16" | Round | 2 | 0.312" | 00000000 | 00000 | ||
| No. 10 | 0.332" | 2 1/4" | 3/8" | Round | 2 | 0.6" | 000000000 | 00000 | ||
| 1/4" | 0.406" | 1 3/4" | 7/16" | Round | 2 | 0.375" | 00000000 | 00000 | ||
| 1/4" | 0.406" | 2 3/4" | 3/8" | Round | 2 | 0.84" | 000000000 | 00000 | ||
| 5/16" | 0.490" | 1 15/16" | 1/2" | Round | 2 | 0.375" | 00000000 | 00000 | ||
| 5/16" | 0.490" | 3" | 1/2" | Round | 2 | 1.02" | 000000000 | 00000 | ||
| 3/8" | 0.593" | 2 11/32" | 5/8" | Round | 2 | 0.468" | 00000000 | 00000 | ||
| 3/8" | 0.593" | 3 1/2" | 1/2" | Round | 2 | 1.218" | 000000000 | 00000 | ||
| 7/16" | 0.687" | 2 1/2" | 5/8" | Round | 2 | 0.5" | 00000000 | 00000 | ||
| 7/16" | 0.687" | 4" | 1/2" | Round | 2 | 1.404" | 000000000 | 00000 | ||
| 1/2" | 0.781" | 2 11/16" | 5/8" | Round | 2 | 0.562" | 00000000 | 00000 | ||
| 1/2" | 0.781" | 4 1/2" | 1/2" | Round | 2 | 1.596" | 000000000 | 000000 | ||
| M3 | 5.9 mm | 1 1/4" | 1/4" | Round | 2 | 6.35 mm | 00000000 | 00000 | ||
| M4 | 7.5 mm | 1 3/8" | 1/4" | Round | 2 | 7.54 mm | 00000000 | 00000 | ||
| M5 | 9.1 mm | 1 1/2" | 5/16" | Round | 2 | 7.94 mm | 00000000 | 00000 | ||
| M6 | 10.7 mm | 1 9/16" | 5/16" | Round | 2 | 9.52 mm | 00000000 | 00000 | ||
| M8 | 13.4 mm | 1 13/16" | 7/16" | Round | 2 | 11.11 mm | 00000000 | 00000 | ||
| M10 | 16.6 mm | 2 1/16" | 1/2" | Round | 2 | 14.29 mm | 00000000 | 00000 | ||
| M12 | 18.7 mm | 2 7/16" | 5/8" | Round | 2 | 15.87 mm | 00000000 | 00000 | ||
| M14 | 21.8 mm | 2 5/8" | 5/8" | Round | 2 | 16.67 mm | 00000000 | 00000 | ||
| M16 | 24.6 mm | 2 3/4" | 5/8" | Round | 2 | 17.46 mm | 00000000 | 00000 | ||
Drill-Point Counterbore Sets
 |
Skip a step when installing screws of various thread diameters in metal. With a sharp point on the tip, these counterbores drill a pilot hole topped with a flat recess for the screw head. That's faster and more accurate than switching to a counterbore in between passes with your drill bit.
High-Speed Steel—Durable and wear resistant, these counterbores make accurate cuts in most materials without chipping or cracking.
For Screw Size | No. of Pieces | Shank Type | No. of Flutes | Container Type | Each | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Uncoated High-Speed Steel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| No. 5, No. 6, No. 8, No. 10, 1/4", 5/16", 3/8", 7/16", 1/2" | 9 | Round | 2 | Plastic Case | 00000000 | 0000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| No. 5, No. 6, No. 8, No. 10, 1/4", 5/16", 3/8", 7/16", 1/2" | 9 | Round | 2 | Plastic Case | 00000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M3, M4, M5, M6, M8, M10, M12, M14, M16 | 9 | Round | 2 | Plastic Case | 00000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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
 |  |
Counterbore Collars |
Counterbore Collars—Attach with a set screw to stop the counterbore at the exact depth you need.
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" | 0000000 | 000000 | 7/8" | 1/4" | 0000000 | 00000 | ||
| 5/8" | 1" | 4 | 1/4" | 0000000 | 00000 | 7/8" | 1/4" | 0000000 | 0000 | ||
| 3/4" | 1" | 4 | 1/4" | 0000000 | 00000 | 1" | 1/4" | 0000000 | 0000 | ||
| 3/4" | 1 1/8" | 4 | 5/16" | 0000000 | 00000 | 1" | 1/4" | 0000000 | 0000 | ||
| 7/8" | 1 1/4" | 4 | 3/8" | 0000000 | 00000 | 1 1/8" | 1/4" | 0000000 | 0000 | ||
| 1" | 1 3/8" | 4 | 7/16" | 0000000 | 00000 | 1 1/4" | 5/16" | 0000000 | 0000 | ||
| 1 1/8" | 1 1/2" | 4 | 1/2" | 0000000 | 00000 | 1 3/8" | 5/16" | 0000000 | 0000 | ||
| 1 1/4" | 1 5/8" | 4 | 9/16" | 0000000 | 00000 | 1 1/2" | 3/8" | 0000000 | 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. | No. of Pieces | Container Type | Each | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Uncoated Steel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3/46", 1/4", 5/16", 3/8", 7/16", 1/2" | 6 | Wood Stand | 0000000 | 0000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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
 |  |
Drill Stops |
Drill 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 | Drill 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" | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 00000 | ||
| 1/2" | 2 7/8" | 1/4" | Quick-Change Hex | 3 | 1.2" | 1/8" | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 0000 | ||
| 5/8" | 3 1/4" | 1/4" | Quick-Change Hex | 3 | 1.3" | 3/16" | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 0000 | ||
| 5/8" | 3 21/32" | 1/4" | Quick-Change Hex | 3 | 2.7" | 1/4" | 00000000 | 00000 | ——— | 0 | 0000000 | 0000 | ||
| 3/4" | 3 1/4" | 1/4" | Quick-Change Hex | 3 | 1.3" | 3/16" | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 0000 | ||
| 3/4" | 3 5/8" | 1/4" | Quick-Change Hex | 3 | 1.6" | 1/4" | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 0000 | ||
| 3/4" | 3 31/32" | 1/4" | Quick-Change Hex | 3 | 3" | 5/16" | 00000000 | 00000 | ——— | 0 | 0000000 | 0000 | ||
| 1" | 4 11/16" | 1/4" | Quick-Change Hex | 3 | 3.7" | 7/16" | 00000000 | 00000 | ——— | 0 | 0000000 | 00000 | ||
