Features: Round head button studs craft from quality alloy metal rust resistant good durability not easy to break for long time use. Round head button studs with installation tool enough quantity to meet your crafting need for craft. Round Head Button Studs Diameter: 3 different size: 4MM; 7MM; 8MM. Choose as your need. Easy to Use. These button studs features screwback spots round base. Easy to screw on. Widely used for repair and decorating your shoe belts handbag bags purses jackets jeans wristbands hat dog collars clothing bracelets wristband necklaces and more craft making. Specifications: Color: Black; Silver; Light Gold; Bronze; Silver Gold; Black Brass; Silver Bronze； 4 Color Component: Metal Type: 4MM; 7MM; 8MM Size: Approximately. 4mm/0.16in Size: Approximately.7mm/0.28in Size: Approximately. 8mm/0.31in Weight: Approximately. 28-165g Note: 1.Please allow 0-1cm error due to manual measurement. Make sure you donot mind before bid. 2.Due to difference between different monitors the picture may not reflect the actual color Package includes: 1Set Round Head Button Studs 1Piece Punching Tool 1Piece Storage Case