The Master Lock Magnum® M115XDLF covered laminated steel padlock with key features a laminated steel body for maximum strength and reliability, and is surrounded by stainless steel and zinc outer components for weather resistance. The Rust-Oleum® certified protection provides a lifetime guarantee against rusting on the lock body; and covered lock body, keyway, and shackle seals offer additional weather protection. The octagonal shackle is made of Tough-Cut(TM) boron-carbide, 50% harder than hardened steel, offering maximum resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide maximum resistance against prying and hammering. The lifetime guarantee provides peace of mind from a brand you know and can trust. Rust-Oleum certified protection is a registered trademark of Rust-Oleum corporation.