Low Alloy Blades: These blades are treated in specially designed furnaces , with controlled atmosphere to minimise decarburisation. This quality is most suitable for cutting relatively soft material like Aluminium, Brass, Copper, M.S and carbon steel where the hardness is lower than 15RC.High Speed Steel Blades: These blades have long life and are recommended for cutting rather difficult to cut materials like stainless steel, shock resisting steel, die-steel, high speed steel etc.