2 PACK 4mm Cobalt High Speed Steel HSS Drill Bits Hardened Steels & Cast Iron

Cobalt Drill Bits 2pk 4.0mm

Overview

HSS precision ground from M35 high speed steel bars with 5% cobalt. For alloys, hardened steels, cast irons, titanium and other hard-to-drill materials such as stainless steel. Always use cooling agent.