High speed steel blacksmith drill bits with reduced shank to 10mm. For drilling alloy and carbon steel, cast iron, nonferrous metal and plastics.Fully ground from hardened solid material. High quality DIN338, split point to DIN1412C. Less tolerance and longer life than the equivalent roll-forged. 135 degree split point, cross ground finish enabling direct drilling without prior centering. Safe pilot hole drilling ( no wandering off). Less feed power. Better chip removal.