[Material]: The button stud rivet is made of metal material, which is wear-resistant, corrosion-resistant, and not easy to rust. It adopts a roller plating process, with a smooth surface, durability, and long-lasting performance. [Practical]: The two parts of the round head leather rivets can fit tightly, and it is firm and not easy to shake after installation. The screw is centered and the cross groove is small, making it both practical and beautiful. It is a good choice for DIY leather crafts. [Easy to Use]: These ball head rivet is easy to install and remove. Simply use a punch to make a hole in the leather, insert the screw through the hole, cover the button stud, and tighten the screw with a screwdriver to complete the installation. [Wide Application]: The round head button stud rivet is widely used to connect any small belts and straps, you can use them to repair your bags, shoes, belts, jackets, jeans, clothes, etc., or as leather DIY accessories and decorations. Color: Bronze Button Stud Size: 10.8x10.5x9.7mm / 0.43x0.41x0.38inch (Length*Base Dia*Head Dia) Screw Size: 5.8x2.8mm / 0.23x0.11inch (L*Dia) Package Content: 30pcs x Chicago Screws