Make of stainless steel, exquisite workmanship, resistant and enduring, not easy to break Widely used in woodworking, metalworking and general construction applications to connecting hardware such as screws or bolts to surfaces The raised cup shape provides extra and protections for the surfaces to be attached The main function of stainless steel washers is to ensuring even load distribution, reduce the risk of fasteners damaging surfaces Easy to Use Just place the metal disc on the screw or bolt and insert it into the pre-drilled hole, Manufacturer: Zeizafa