This 3 Flute Starcut Countersink is one tool for all materials. Just change speed on your machine and you can debur or countersink any material to any depth. Speed recommendation: 110/250 RPM on Hardended Steel: 250/1000 RPM on soft material. Supplied with hardened Steel Shank. Technical Description Head Dia: 1 /2” Shank Dia: 1 /4” No. of Flutes: 3
