Scan Brass Padlocks provide an excellent level of security. Each lock features a brass cylinder mechanism that is accurately machined making it durable and rust resistant. They have stainless shackle springs and a steel shackle with a self-locking action. All brass padlocks above 30mm in body size have hardened anti-cut and saw resistant shackle with double locking tongues for improved security. Each padlock is supplied with 3 keys. This Scan Brass Padlock has the following specification: Padlock Width: 40mm.Shackle Height: 63.6mm.Shackle Diameter: 6.3mm.Shackle Width: 20.7mm.Security Rating: 6.