... felt bob 2)Can be mounted in a drill grinding head1)wool felt bobs,polishing felt bob 2)Can ... , high density felt, is cut by mechanical stamping mill, made of various shape felt bob. 2. Felt bob have ... , outer, Corner, groove, arc, cone angle of the inner wall of the mill special mold polishing, nylon, stainless steel, high ... , stone carving, jade carving, ceramic arts, etc. grinding head of wool felt