KEO 53518 Cobalt Steel Single-End Countersink Set, Uncoated (Bright) Finish, 82 Degree Point Angle, 5/16" - 5/8" Head Diameter

Straight shank, CNC precision cam ground, M35 cobalt, chatter-free cutting action. Made in Great Britain. Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications. 82 degree angle.