Detailed Product Description cup wheel is Suitable for non-ferous metal and less harness ,works ... quality products, the reasonable price, the best services. The cup wheel is used for grinding common non-ferrous metal ,copper ,aluminum ... is 4"X 2 X 5/8- 11 , 5 X 2 X 5/8-- 11 , 3 X 2 X 5/8--11, 2 X 2 X 5/8 ...