Countersink: 82°, 6 Flute, 1 3/4 in Body Dia, 3/4 in Shank, High Speed Steel

Six-flute countersinks provide fast material removal and leave a smooth finish. They remove more material with each revolution and typically provide more wear resistance than countersinks with fewer flutes. High Speed Steel countersinks offer good wear resistance, have some flexibility, and can absorb some shock and vibration. Bright (Uncoated) coating can be resharpened and is a good choice for use on soft materials, such as aluminum and low-carbon steel. Straight shanks have the same diameter along their length. They install in the chuck of a drill press or similar machining tool. 82 ° countersinks are for common Unified Thread Standard (metric) flat- and oval-head screws