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About Countersinks
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Choose the right countersink angle, body diameter, and number of flutes for your application.
Hex-Bit Countersinks for Screws
Pop these countersinks into power drills, screwdrivers, and other tools that accept hex bits. They create a 90° countersink angle that's compatible with metric flat- and oval-head screws. They're also good for deburring screw holes.
High-Speed Steel
 |
3 Flutes |
These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
Quick-Change Hex Drill-Bit Countersinks for Wood and Plastic
Switch bits instead of tools to simplify jobs. These snap directly into drills, power screwdrivers, and other tools that accept a 1/4" hex shank. You can slide the countersink up and down the drill bit and then secure it with a set screw, so one tool will drill countersunk holes for screws of different lengths. These countersinks cut a smooth and even finish in wood and plastic on the first pass.
High-Speed Steel
 |
2 Flutes |
The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.
Countersinks | Replacement Drill Bits | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | Uncoated | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Body Dia. | Max. Hole Drilling Dp. | Hard Wood | Soft Wood | Overall Lg. | Shank Size | Shank Type | Each | Each | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
2 Flutes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
82° Countersink Angle | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1/2" | 1" | — | No. 6 | 2 11/16" | 1/4" | Quick-Change Hex | 2747A22 | 00000 | 8870A16 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1/2" | 1" | No. 4 | — | 2 9/16" | 1/4" | Quick-Change Hex | 2747A21 | 0000 | 8870A15 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1/2" | 1" | No. 6 | No. 8 | 2 27/32" | 1/4" | Quick-Change Hex | 2747A23 | 0000 | 8870A17 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1/2" | 1" | No. 8 | No. 10 | 2 31/32" | 1/4" | Quick-Change Hex | 2747A24 | 0000 | 8870A18 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1/2" | 1" | No. 10 | No. 12 | 3 3/32" | 1/4" | Quick-Change Hex | 2747A25 | 0000 | 8870A19 | 0000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Hex-Bit Countersink Sets for Screws
 |
Pop these countersinks into power drills, screwdrivers, and other tools that accept hex bits. They create a 90° countersink angle that's compatible with metric flat- and oval-head screws. They're also good for deburring screw holes.
High-Speed Steel—These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.
90° Countersink Angle | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
No. of Flutes | Body Dia. Included | No. of Pieces | Finish | Includes | Shank Type | Container Type | Each | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
High-Speed Steel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3 | 3/16", 5/16", 3/8", 7/16", 5/8", 3/4" | 8 | Uncoated | 1/4" Bit Screwdriver, 1/4" Hex Shank Extension | Hex | Plastic Case | 3393N1 | 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" | 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 | 0000 | ||
| 1" | 4 11/16" | 1/4" | Quick-Change Hex | 3 | 3.7" | 7/16" | 3438N313 | 00000 | ——— | 0 | 2908A57 | 00000 | ||
Quick-Change Combination Countersinking Drill/Screwdriver Bit Sets
 |  |
Fasten differently sized screws with these sets. They save you the effort of switching three separate bits in and out of a power tool, instead letting you flip between a countersinking drill and a screwdriver bit with a single hand. You can also attach your own countersinking drills and screwdriver bits as long as they have a 1/4” hex shank.
Countersinking drills have an 82° angle, allowing inch-sized flat- and oval-head screws to sit flush with the surface.
Drill/Screwdriver Bits | Replacement 3/32" Drill Bits | Replacement 7/64" Drill Bits | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
No. of Pieces | Includes | Countersink Angle | Countersink Body Dia. | No. of Countersink Flutes | Adapter Hex Shank Size | For Use On | Each | Each | Each | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Black-Oxide High-Speed Steel Countersink | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 11 | 1 Drill-Bit Countersink for 3/32" Drill Bit 1 Drill-Bit Countersink for 7/64" Drill Bit 1 Drill Bit (3/32" Drill Bit Size) 2 Drill Bits (7/64" Drill Bit Size) 1 Phillips No. 1 Screwdriver Bit (1" O'all Lg.) 2 Phillips No. 2 Screwdriver Bits (1" O'all Lg.) 1 Reversible Shaft 1 Adapter 1 Hex L-Key | 82° | 3/8" | 4 | 5/16" | Aluminum, Fiberglass, Plastic, Wood | 3470N11 | 000000 | 3471N14 | 00000 | 3471N15 | 00000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Quick-Change Combination Countersinking Drill/Screwdriver Bits
|  |
Drill, countersink, and drive screws without switching three separate bits in and out of your power tool. With a single hand, flip between drilling countersunk holes and driving screws. The countersinking drill and screwdriver bit are secured with set screws, so you can switch them out for any bits with a 1/4” hex shank.
The countersinking drill has an 82° angle, allowing inch-sized flat- and oval-head screws to sit flush with the surface.
Drill/Screwdriver Bits | Replacement 7/64" Drill Bits | Replacement 1/8" Drill Bits | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | Drill Bit Size | Countersink Body Dia. | Max. Hole Drilling Dp. | Countersink Angle | Screwdriver Bit Size | For Drive Style | Adapter Hex Shank Size | Adapter Lg. | For Use On | Each | Each | Each | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Black-Oxide High-Speed Steel Countersink | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
4 Countersink Flutes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| No. 8 | 7/64" | 3/8" | 2" | 82° | No. 2 | Phillips | 5/16" | 3 3/4" | Aluminum, Fiberglass, Plastic, Wood | 3471N12 | 000000 | 3471N15 | 00000 | ——— | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| No. 10 | 1/8" | 3/8" | 2 1/4" | 82° | No. 2 | Phillips | 5/16" | 3 3/4" | Aluminum, Fiberglass, Plastic, Wood | 3471N13 | 00000 | ——— | 0 | 3471N16 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
