The Masterlock Pro Series™ Shrouded Shackle Padlock range is designed to endure the toughest security applications by providing extra protection against corrosion, abuse and attack. They have tough boron alloy shackles, dual ball bearing locking mechanisms for maximum pry resistance and layered laminated steel cores for strength. The shrouded shackle design provides additional protection, and the xenoy outer casing delivers excellent weather resilience. The precision 6-pin cylinder delivers optimal pick resistance and is protected by a snap-on cap. Lifetime Warranty against mechanical failure. Suggested uses: gates, sheds, storage units, fences, containers and chains.The Master Lock 6321KA-10G016 has the following specifications:54mm laminated steel padlock with xenoy protective cover - 19mm boron alloy shackle, 8mm diameter with iron shroud - precision 5-pin cylinder - dual ball bearing locking - key retaining - keyed alikeAdditional Information:• Padlock Type: High Security• Body Width (mm): 54• Shackle Diameter (mm): 8• Shackle Height (mm): 19• Shackle Width (mm): 22