Union Butterfield 4608 1In 82 Degree 3 Flute High Speed Steel Center Reamer Countersink 46262133

Widely Used to Countersink Screw Heads and Rivet Heads, and Countersink Holes for Lateh Centers. The Odd Number of Flutes Eliminates Chatter in Most Applications While Providing Better Accuracy than a Single-flute.