You are Buying Brand New And Factory Sealed Master Lock Heavy Duty Outdoor Padlock with Key, 2-1/8 in. Wide, 2-1/2 in. Shackle, 2 Pack Model # M515XTLJHCSEC.... Octagonal lock shackle is 3/8 in. (10 mm.) wide in diameter and is 2-1/2 in. (64 mm.) long and made of Tough-Cut boron-carbide, 50% harder than hardened steel, offering maximum resistance from cutting and sawing. Lock four-pin cylinder prevents picking and the dual locking ball bearings provide maximum resistance against prying and hammering. Master Lock's Lifetime Guarantee provides peace of mind from a brand you can trust. Indoor and outdoor padlock; maximum security lock 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.. Four-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... Measurements: 2-1/8 in. (54 mm.) wide lock body; 3/8 in. (10 mm.) diameter shackle with 2-1/2 in. (64 mm.) length, 15/16 in. (24 mm.) width; Extended shackle for application flexibility