The Master Lock Excell Weather Tough Padlocks are made with cutting edge technology to deliver unprecedented security. They feature tough cut patented octagonal boron carbide shackles which are 50% tougher to cut than hardened steel, and dual ball bearing locking mechanisms for maximum pry resistance. Made from laminated steel with a thermoplastic cover for maximum protection against the elements. They have a Rust-Oleum rustproof finish that guarantees the body free from rust and either a precision 4-pin or 5-pin cylinder. Supplied with 4 keys and a Lifetime Warranty against mechanical failure. Suggested uses: gates, sheds, storage units, fences, containers and chains.