Diameter?: 4,2 mm ? total length 75 mm ? Length?: spiral 43 mm Special high-performance high-speed steel with cobalt chrome coating with faster heat resistance and hardness, ideal for drilling difficult materials and chip removal performance for maximum durability Cone-shaped correction with split point according to DIN 1412 C Cutting angle?: 130°, Helix angle?: 20?30 ° ? Tolerance diameter?: H8, brown-gold, surfaces, cutting line on the right side Applications?: For steel and chrome die-cast steel and non-alloy (up to a strength of?: approx. 900 N/mm², gray cast iron, ductile cast iron, with high chrome alloys, such as V2 a and V4 a, stainless steels and glasses are acid - model: 215042