Tri-metal Rivet, which could save silver material about 60%, and electrical equipment with Tri-metal rivet could cut the cost a lot. Tri-metal rivet can replace solid rivet in some place, and the cost is low than solid rivet. So more and more customer begin to use tri-metal rivet replace of solid rivet. We import 3 sets OD trimetal machine fro Germany. And we send our engineer to Germany to study the tech about trimetal rivet, so our trimetal rivet are of good quality, and our products are very popular in the world market, because our products are of good quality with competitive price. Inner packing: Vacuum plastic bag Outer packing: Carton