The Master Lock Magnum M15XDLF Laminated Padlock features a 2-1/2 in. (64 mm) wide laminated steel body for maximum strength and reliability and is surrounded by stainless steel and zinc outer components for weather resistance. The 7/16 in. (11 mm) Dia octagonal shackle is 1-1/2 in. (38 mm) long and made of Tough-Cut boron-carbide, 50% harder than hardened steel, offering maximum resistance to cutting and sawing. The 5-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. Features: Indoor and outdoor padlock; maximum security lock with Tough-Cut octagonal boron-carbide shackle is best used as a gate lock, shed lock and storage locker lock Key lock is constructed with dual-armor protection: laminated steel core for strength surrounded by stainless steel and zinc outer components for weather resistance; reinforced body bumper for scratch resistance 5-pin cylinder and dual ball bearing locking mechanism provides maximum pick and pry resistance; Tough-Cut octagonal boron-carbide shackle is 50% harder than hardened steel 2-1/2 in. (64 mm) wide lock body; 7/16 in. (11 mm) Dia shackle with 1-1/2 in. (38 mm) length, 1-3/16 in. (30 mm) width; extended shackle for application flexibility 1-padlock, 2 keys Keyed alike for added convenience