The rivets and the pads are made of copper. They have high hardness, high hardness, no rust, wear resistance, resistance. The fixed device is stainless steel and the punch is steel. copper rivets, 5 sizes: 9 x 3 x 11mm, 9 x 3 x 13mm, 9 x 3 x 16mm, 9 x 3 x 21mm and 12 x 4 x 21mm;.
