Short length dream drill bits without coolant holes. Right hand spiral, 30 degree helix. 140 Degree point angle. Made of carbide. Shank tolerance ød2: h6 =+0.0/-0.0003. 3xD. TiAlN-coated. Application for drilling into steel in general, cast steel, cast iron, chilled cast iron, malleable cast iron, non-ferrous heavy metal, non-ferrous light metal, abrasive plastic. Advantage: Self centering (center drilling is not required); Excellent positioning (bush is not necessary) and Special Design (reaming is not required, good chip removal, powerful drilling).