... blind rivets. The respective materials for the cap part and the mandrel we use are Aluminum+Steel, Aluminum alloy+steel, Steel+Steel, Stainless Steel+Steel, Stainless Steel+Stainless Steel ... principlesquality is life, service is insurancemajor productsshoe tacks nails,blind rivets,concrete nails,common nails,roofing nails, small machine ... can enjoy our improving service. new aluminum blind rivets