IRWIN IRWIN Tools 1877791 Black Oxide Countersink Drill Bit, 5-Piece Set
by Irwin
- Precision-ground 82 tip for countersinking into 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" round shank fits all handheld and stationary drills
