4x Padlock Brass 4 keys Security rating: 5 Shackle clearance: 54mm 4-pin tumbler locking mechanism 6mm thick hardened steel shackle Size: 40mm Tessi 40Mm Keyed Alike Solid Brass Padlock 4 Pack | Te40q A 4-pack of 40mm brass padlocks keyed alike. The 40mm solid brass body padlock has a 4-pin cylinder and a 6mm hardened steel double locking shackle making it a great lock for around the house and office. It has a rubber ring around the shackle which helps prevent water ingress when used outdoors. Each pack comes with 4 keys.