Alfa USAs Cobalt M42 Jobber Length drill bits are manufactured from heat resistant steel to NAS 907, Type J standards. Cobalt M42 high speed steel maintains cutting ability at temperatures exceeding 1000 degrees F. This heat resistance enables use in harder, high-tensile strength steels like stainless steel, titanium, armor plate, Inconel and other difficult-to-machine materials. Model # CO51920 Features: Manufactured from heat-resistant cobalt M42 high-speed steel, these drills maintain their cutting ability at temperatures exceeding 1000 degrees F 4. 00mm Diameter( 0. 25" L x 2. 5" W x 0. 25" H.
