... 2)Can be mounted in a drill grinding head1)wool felt bobs,polishing felt bob 2)Can be ... and usage: 1. Felt bob is according to customers' requirement, select different quality class, high density felt, is ... inner, outer, Corner, groove, arc, cone angle of the inner wall of the mill special mold polishing, nylon, stainless steel, high ... , jade carving, ceramic arts, etc. grinding head of wool felt