HSS Reduced Shank Pro Drill Bit 12.0mm OL:151mm WL:101mm - IRWIN 10502409, The Irwin HSS Pro Drillbits 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.The Irwin HSS Reduced Shank Pro Drill Bit has the following specification: Diameter: 16.0mm.Working length: 120mm.Total length: 178mm.Shank diameter: 10mm. IRWIN® 10502409 HSS Reduced Shank Pro Drill Bit 16.0mm OL:178mm WL:120mm