The IRWIN® HSS Pro Drill Bits are made from high-performance high-speed steel They have a 118° split point shape for increased performance and very good centring The drill bits ensure precision starting with no need to pre-punch or pilot drill They penetrate the material quickly requiring little effort and feed pressure Manufactured to DIN 338 standards DIN 338 drill bits are suitable for many trade and industrial applications in alloyed and unalloyed steel non-ferrous metal cast iron and plastics