Product Description

72423 Countersink Drill Bit Set: Flush Screws, Clean Edges
Countersinking shouldn't be the frustrating part of the job. The POWERTEC 72423 set gives woodworkers, cabinet makers and metalworkers smooth, flush countersinks without the chatter, torn edges or quick dulling that cheap bits cause.
Five nitrided HSS chamfer bits (1/4" to 3/4") cover the flat head screws you use most. Each bit countersinks and deburrs in a single pass, so you skip the second tool. Use them on wood, aluminum, copper, mild steel, hard plastic and fiberglass.
Key Features & Benefits
5-Flute Cutting Head
- Five cutting edges share the work, so the bit self-centers and stays put instead of skating across the surface.
- Less chatter and vibration means a smooth, even countersink in both metal and wood, not a ragged edge.
Nitrided HSS That Holds Its Edge
- High-speed steel with a surface-nitrided cutting edge adds hardness plus wear, heat and corrosion resistance.
- The edges keep cutting efficiently job after job, so you replace bits less often.
True 90° Countersink and Deburring Bit
- The 90° cone is ground for metric and ISO flat head screws, seating heads flush with the surface or just below it.
- Deburrs a freshly drilled hole in the same pass, so there's no second tool to grab.
1/4" Quick-Change Hex Shank
- Snaps into an impact driver for tool-free bit swaps, or chucks straight into any standard drill or drill press with no adaptor.
- Run it in normal drill/drive mode, not impact or hammer mode, to protect the cutting edge.
5 Sizes in a Labeled Storage Case
- Includes 1/4", 3/8", 1/2", 5/8" and 3/4" bits, laser-etched with their size for quick sorting.
- The labeled case keeps every bit organized and protected on the bench or in the truck.
- For the longest bit life, run slower speeds in metal and avoid hardened steel, stainless, tile, ceramic, stone, concrete and tempered glass.

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov