The Master Lock ProSeries Weather Tough Padlocks 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. Ideal for harsh outdoor conditions, the Weather Tough xenoy outer casing delivers excellent weather resilience, protecting the lock from water, ice, dirt and grime. The precision pin cylinder delivers optimal pick resistance and is protected by a snap-on cap. All Master Lock Pro Series Padlocks are supplied with a minimum of 2 keys and a Lifetime Warranty against mechanical failure. Suggested Uses: gates, sheds, storage units, fences, containers and chains.