Draper Expert Hsse M35 Cobalt Drill Bit 4.0mm X 75mm (Pack Of 2) - 08913. These M35 high speed steel drill bits are manufactured with 5% cobalt for long-lasting performance, abrasion resistance and heat protection. Fully ground with a 135° split point for precise centring to prevent drill wander. For optimal results and a longer lifetime, Draper cobalt drill bits work best in conjunction with a cooling agent. Suitable for use with alloy steel, titanium alloys, stainless steel, hardened steel, cast iron and carbon steel. Compatible with a standard 10/13mm chuck. Features: M35 high speed steel with 5% cobalt for long-lasting performance, abrasion resistance and heat protection. Fully ground with a 135° split point for precise centring. For optimal results use in conjunction with a cooling agent. Suitable for use with alloy steel, titanium alloys, stainless steel, hardened steel, cast iron and carbon steel. Compatible with a standard 10/13mm chuck. Manufactured to DIN338 and DIN1414-2. Specification: Drill bit type: M35 steel HSSE. Drill tip angle: 135°. Flute: Single. Connection: Round shank. Construction: Fully ground. Length: 75mm. What is included: 2 x HSSE M35 Cobalt Drill Bits - 4.0mm x 75mm.