HSS Double End Drill Bits HSS Double End Drill BitsProduct Description:1. HSS Twist Drill Bits, Double Ended2. Fully Ground3.4341, 9341, M2, M35, M424.3.0mm-6.5mm5. White, TIN Coated, Rainbow Color, Bright, Black & Bright, Zirconium Coating, Black, Coffee Color, etc.6.118° Or 135°Hardened high speed steel body provides additional safeguard.Industrial grade cobalt high speed steel are ...