Guhring HSSCo Jobber Drill Bits are manufactured from premium cobalt high-speed steel (HSSCo), offering excellent heat resistance and extended tool life when drilling stainless steel, hardened steel, alloy steel and other difficult-to-machine materials. If you need a trusted brand, Guhring German made products have been designed and manufactured for more than 100 years. Tool Material HSSCo Surface Finish Bright Point Angle 118 Deg DIN 338 Tolerance H8 Guhring No. 5523