Padlock Brass 3 keys 4-pin tumbler locking mechanism 5mm thick hardened steel double-locking shackle Size: 30mm Tessi 30Mm Solid Brass Padlock | Te30 The 30mm solid brass body lock comes with a 4-pin cylinder and a hardened steel 5mm double-locking shackle. It has a rubber ring aound the shackle to help prevent water ingress if used outside. This makes it a great all round padlock for school or gym lockers and other small hasp applications. Each lock comes with 3 brass nickel-plated keys as standard.