Detailed Product Description: 1.Ceramic combined emery wheel 2.The major charcteristic:hard-wearing,strong power grinding 3.Purpose:for metals grinding,mending and so on 4.Diameter of shank:¦2.35mm 5.Material: PA(pink fused alumina), WA(white fused alumina), A(alumina), GC(green silico carbide) Shape:Cylinder,Oval,Triangle awl,Round awl,Ball,Flat head awl,Flat