IRWIN Countersink Drill Bit Set for Metal, 5-Piece (1877793)
Brand: Irwin Tools
Precision ground 82° tip for countersinking most machinable metals, wood, and 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