This is a set of rivet dies for a hand press machine. The set includes five sizes, from 4mm to 12mm, allowing you to attach rivets according to your needs. It's perfect for making bags, wallets, belts, and other items, as it allows you to easily attach rivets to leather products and other materials. Color: Silver Sizes: Die attachment part, M8 screw type (screw pitch 1.25), 19mm snap-in type Materials: Carbon steel, rubber