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About Counterbores
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Create flat-bottomed holes, so your screw heads sit flush, recessed, or slightly raised.
Adjustable-Diameter Counterbores
High-Speed Steel Blade
 |  |
Round Shank | Morse Taper Shank |
Counterbores | Replacement Counterbore Blades | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Shank | ||||||||||||||
Body Dia. | Overall Lg. | Dia. | Type | Machine Taper No. | Pilot Lg. | No. of Flutes | Pilot Head Dia. | Pilot Shank Dia. | Each | Pkg. Qty. | Pkg. | |||
| 1" to 1 1/4" | 4" | 1/2" | Round | — | 0.438" | 2 | 7/16" | 3/16" | 0000000 | 0000000 | 2 | 0000000 | 0000000 | |
| 1 1/4" to 1 5/8" | 4 3/8" | 1/2" | Round | — | 0.563" | 2 | 9/16" | 1/4" | 0000000 | 000000 | 2 | 0000000 | 000000 | |
| 2 1/8" to 2 7/8" | 6" | — | Morse Taper | Morse 3 | 0.750" | 2 | 3/4" | 3/8" | 0000000 | 000000 | 2 | 0000000 | 000000 | |
