1)Suitable for cutting&grinding Casting parts, Iron, steel, ductile iron, composite material, hard materials, 2)Curtting speed and efficient is 50% plus more than traditional disc. 3)Service life is 25-30 times more than traditional cutting disc. 4)No pollution , very low noise. 5) Free sample can be supplied for testing . 6)Approved by many users in Canada, USA , Europe