For modern industrial production, in particular mass production, machining is one of the most important shaping and forming processes. Almost all tools employed for this purpose are made from high speed steels. The characteristic properties of all high speed steels grades include. High working hardness High wear hardness Excellent toughness High retention of hardness and red hardness Sr. No.Products 1. M - 2 2. M - 35 3. M - 42 4. T - 1 5. T -