Irwin 1877714 Drill Bit 1/4 in Dia 1-17/32 in OAL Countersink 5-Flute 1/4 in Dia Shank Round Shank

Precision ground 82 deg tip for countersinking most machinable metals, wood or plastic. High-speed steel with black oxide coating for corrosion resistance. 5-flute design reduces chatter for smoother drilling and extended life.