15 Sets 12.5/15/17mm Gunmetal Black Snap Fasteners Press Studs Kit Sewing Buttons For Clothing,Jackets, Jeans, Bags, Straps Other Sewing Projects Clothes Repair (12.5mm 15 Sets w/Tool) Widely used for leather craft, handbags, clothing, leather straps, jackets, Jeans etc. Material: Brass (non-rust); Size: 12.5/15/17mm (front part); Color: Gunmetal Black(NOT the true black , it's close to the dark gray color); Supplied by sets (each set includs 4 parts: Front, Female, Male and Back) ;Pack supply 15 sets snap with tools; You need to use the hammer to work with the tools;The 15mm with Long Post size can go through 4mm thickness leather ; and the 15mm size can go through the 2.5mm thickness leather;