This is a set of crimping dies for hand press machines. The set includes five sizes, from 4mm to 12mm, allowing you to attach crimps according to your needs. It's perfect for making bags, wallets, belts, and more, as it allows you to easily attach crimps to leather products and other materials. Color: Silver Sizes: 4mm, 6mm, 8mm, 10mm, 12mm Materials: Carbon steel, rubber