Size range 0.5 mm to 20 mm.Top angle of 135° with self-centring split-point tip for quick cutting and perfect centring.Drill bits have a cylindrical shank (shank equal to drill bit diameter) and are designed for use in drill stands and drill drivers.The cobalt high-speed steel (HSS) provides long-lasting high performance when drilling in stainless-steel materials.Cobalt drills work well in alloyed/non-alloyed steel, stainless-steel, cast iron, cast steel and acid- and heat-resistant steels.Manufactured to DIN 338 N