This set of HSS-Co drill bits have a cylindrical shank. They are made of high precision cobalt alloy high speed steel with 135-degree split-point tip. Suitable for soft electrical steel, stainless steel, structural steel and case hardening steel, as well as for carbon steel in non-alloy and alloy grades with a tensile strength of up to 1,100N/mm2. It can also be used for cast iron, brass, copper and aluminium. There are 10 drill bits with different diameters (Ø1, 2, 3, 4, 5, 6, 7, 8, 9, 10) which are included in a plastic case with hanger.