Size 1 mm up to 4 mm, two drills in each tube.Top angle of 130° 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.High-speed steel (HSS) drill for drilling in bronze, brass, carbon steel, cast iron, alloy steel and stainless steel.Manufactured to DIN 338 N