Irwin 1877720 1877720 - DRL BIT CNTRSINK 82' BLK OX 3PC SET CLAM

Irwin Tools 1877720 Countersink Drill Bit, Black Oxide, 3-Piece. 1/2, 5/8, 3/4. 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.