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; You will receive 50 solid copper rivets with pads, 2 different sizes of punching device and 1 cushion fixed device This kit includes copper rivets and padding, as well as punch and pads.It provides everything you need to create leather work.Easy to repair and decorate your handbags and other leather technology Rivets used for DIY leather crafts can be used as fixed or decorative items.Such as belt, handbags, wallets, clothes, key bags, wallets, crossbody bags, pet collars, leather bracelets and various DIY leather crafts Material: Copper Color: As shown Package Contents: 1 set leather working kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.