The Master Lock Magnum M15XTLF 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.) diameter octagonal shackle is 1-1/2 in. (38 mm.) long and made of Tough-Cut boron-carbide, 50 percent 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. • Outdoor lock; heavy duty padlock with key is best used for outdoor storage and fences, self-storage units and lockers, tools, job boxes and more • Key lock features dual armor construction: laminated steel lock body surrounded by stainless steel and zinc outer components and Tough-Cut octagonal boron-carbide shackle is 50% harder than hardened steel • 5-Pin cylinder and dual ball bearing locking for maximum pick and pry resistance; reinforced body bumper for increased scratch resistance • 2-1/2 in (64 mm) wide lock body; 7/16 in (11 mm) diameter shackle with 1-1/2 in (38 mm) length, 1-3/16 in (30 mm) width; extended shackle for application flexibility • Includes two padlocks with two keys; Both keys open all locks UPC: 071649233272 Weight: 0.75 lbs RKU: LOW3756411