Size 1 mm up to 4 mm, two drills in each tube.Top angle of 135° with self-centring split-point tip for quick cutting and perfect centring.Speed Point, no need to pre-punch or pilot drill up to 10mm diameter.Drill bits have a cylindrical shank and 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 good in following materials alloyed/non-alloyed steel, stainless steel, cast iron, cast steel and acid- and heat-resistant steels.Manufactured to DIN 338 N