Scan Stainless Steel Padlocks provide an excellent level of security and improved corrosion and weather resistance making them ideal for outdoor applications. Each lock features a brass cylinder mechanism that is accurately machined making it durable and rust resistant. They have stainless shackle springs and a stainless steel shackle with a double self-locking action. Each padlock is supplied with 3 keys. This Scan Stainless Steel Padlock has the following specification: Padlock Width: 38mm.Shackle Height: 21.5mm.Shackle Diameter: 6.0mm.Shackle Width: 12.7mm.Security Rating: 5.