... 3.Usage: various relays,contactors,small switches and temp-controllers Rivet contact of copper and silverMain Materials:We can provide you ... , tearing, deformation,scratches and other defects on the surface of rivet contact, and no copper exposed or visible.2. No stratification ... , burr, sripe,pit etc in the side of rivet head3. no liable to oxidization on its surface4. high level ...