... life 5 hing efficient 1,suitable for the grinding process of convex or concave surface.2,the products made from diamond as abrasive ... shape.3, Application:used for polishing mable,granite and other special-sharped stone of the corner. diameterthickness grit3"2.0mm50,100,150,200 ... ,300,400,500,800,1000,1500,2000,3000.Other specification are avaliable upon request.