Irwin 12412 5/8 Inch High Speed Black Oxide Countersink, Each

Key Features Precision ground 82 deg tip for countersinking most machinable metals, wood or plastic Made from industrial-grade high-speed steel for increased durability Black oxide finish for added corrosion resistance Five flute design reduces vibration for smoother drilling and extended life 1/4 in round shank fits all handheld and stationary drills 5/8 Inch High Speed Black Oxide Countersink. Precision ground 82 degree tip for countersinking most machinable metals, wood or plastic. Made from industrial grade high speed steel for increased durability. Includes a black oxide finish for added corrosion resistance. Five flute design reduces vibration for smoother drilling and extended life. 1/4 inch round shank fits all handheld and stationary drills.