CrazyEve Leathercraft 100 Sets No Sewing Metal Press Studs Snap Fastener Refills 831 Snap Button (0.589 inch (15mm)) SIZE: cap diameter is 0.589 inch (15mm) MATERIAL: Metal Color: As picture show INSTALL INSTRUCTION pls check Images we supply,just find from product images on this page.(Install tools are not included,you could buy from our store) USE THESE SNAPS ON shirts, jeans, jackets, bags and leather craft . PACKAGE: 100 sets snaps (Install tools are not included)