Feature●Standard straight shank drill. Made from Swedish steel as the base material●Blade diameter: 0.4 inches (10.5 mm); Groove length: 3.9 inches (100 mm); Total length: 5.4 inches (137 mm); Shank diameter: 0.4 inches (10.5 mm); Weight: 2.4 oz (70 g)●Grinding grooves. Fully polished finish for excellent sharpness●High Speed Steel (HSS)Description For use with ordinary steel