5 Piece Set of Dormer Imperial A002 TiN Jobber Drill Bits with a TiN tip coating for increased tool life and performance. It has a self-centring split point for superb hole quality and positional accuracy. It will drill steel, stainless, cast iron, ceramics, plastics and many other materials with ease. Suitable for both hand and machine use. Made to DIN 338RN/BS328/ISO 235 standards. Sizes 4, 5, 6, 8 & 10mm.