M35 high speed steel with 5% cobalt for strength and wear resistance. 135° split point prevents walkaround. Fully ground with amber finish. Manufactured to DIN338. Always use cooling agent. 1 – 13mm in 0.5 increments. M35 high speed steel with 5% cobalt for strength and wear resistance. 135° split point prevents walkaround. Fully ground with amber finish. Manufactured to DIN338. Always use cooling agent. 1 – 13mm in 0.5 increments.