Mimhooy 1.2mm / 3/64 inch Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel, Cast Iron and Hard Metal

Specifications: Material: HSS with 5% COBALT Angle Point: 135 Degree Flute Type: Spiral T Shank Type: Straight Shank Main Description: *Self-centering split point allows you to drill directly to the size needed without any pre-drilling. *Fully Ground spiral groove design clears particles quickly, decreases friction and heat for a faster and cooler drilling performance. *M35 Grade Cobalt Steel: This drill bit contains 5% Cobalt (M35 Cobalt HSS), which increases the strength, the tool life and makes it more heat-resistant. Rockwell Hardness >= 67. *M35 Cobalt HSS is more suitable for hardened material. Particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy. *135 degree means less force required to remove metal, compared with lower angles like 90° and 118°.