1、Electroplating Process: Snaps adopts a nickel free electroplating process, which will remain as new even after long term use. You can use it with confidence, there is a hammer to help you work. 2、Copper Zinc Alloy: Snap buttons are made of copper zinc alloy, which is strong in structure, nontoxic, rust proof and durable. 3、Lightweight and Portable: Buttons are light in weight, small in size, easy to carry and store, convenient and quick to use, and stable in performance. 4、Wide Application: This sewing button is widely used in leather crafts, handbags, clothing, belts, jackets, backpacks, handbags, shoes, other sewing projects, DIY, etc. 5、DIY Crafts: These buttons can be used for various DIY projects, decorations, etc., and are good gifts for those who like DIY crafts. 30 x Sets of Regular Bronze Concealed Buckle30 x Sets of Regular Silver Concealed Buckle30 x Sets of Star Bronze Concealed Buckle30 x Sets of Star Silver Concealed Buckle3 x Installation Tools1 x Base1 x Hammer1 x Storage Box1 x User Manual Item Type: SnapsMaterial: Alloy, Stainless Steel, PlasticSize: Approx. 15mm / 0.59in, Approx. 14mm / 0.55inSpecifications: 30 Sets of Bronze and Silver Star Each, 30 Sets Each of Conventional Bronze and Silver, 3 Tools, 1 Base, Mini Hammer (Reminder: 1 Male buckle, 1 female buckle is a set)Product Function: Clothing Installation and Modification