... . (3) based on customer's design and requirement . heavy duty hasp and staple- OEM Materialcarbon steel, stainless steel, steel ... tube, steel rod, aluminium , brass, zinc alloy and etc.Processstamping, bending, welding, casting, punching, machingSurfacepowder coating, zinc ... plated, nickel-chrome plated, painting, heat treatment and etcPackingpacked by carton, then on carton or as per ...