【Package & Size】: You will receive 25 pcs round studs, the diameter is 12mm/0.47 inch and the thickness is 7mm/0.28inch, which is suitable for your DIY craft<br> 【Sturdy Material】: The round studs rivets are made of alloy with an electroplating process. They are lightweight, anti rust, and resistant, not easy to fade or deform for long term use<br> 【Easy to Install】: The alloy spikes are easy to install and remove with a screwdriver. Simply install spikes screw back into studs from the side to achieve the secure effect<br> 【Instruction】: 1. Mark & Punch: Decide placement and punch a hole in leather/fabric. 2. Insert Screw: Push the iron screw through the hole from the back. 3. Attach Spike: Align the alloy dragon claw spike and tighten with a screwdriver. 4. Check Firmness: Ensure the spike is secure but not over tightened to avoid damage<br> 【Wide Application】: These round head studs are great for decorating bags, shoes, boots, jackets, belts, garments, wallets, hats, handbags, clothing, and other leather craft DIY projects. If you are a DIY enthusiast, the round spikes studs kit is a great choice<br> Specification:<br> Material: Alloy<br> Size Chart:<br> 1.2cmx1.2cmx0.7cm/0.47inchx0.47inchx0.28inch<br> Package Includes:<br> 25  Pieces 12mm Screw Back Rivets Studs<br> Note:<br> Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.