Master Lock M50XD Magnum Heavy Duty Stainless Steel Discus Padlock with Key The Master Lock Magnum M50XD Discus Padlock features a 3-1/8 in. (79 mm) wide stainless steel body for maximum strength, reliability and corrosion resistance. The fully shrouded design minimizes shackle exposure and protects against bolt cutter attacks. The 7/16 in. (11 mm) diameter octagonal shackle is 11/16 in. (17 mm) long and made of Tough-Cut 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 covered keyway offers maximum weather protection, and reinforced body bumper protects against scratches.. Features Indoor and outdoor padlock with key; maximum security padlock with Tough-Cut octagonal boron-carbide shackle is best used as a storage unit lock, garage lock, shed lock, trailer lock, and moving truck lock Key lock is constructed with Tough-Cut octagonal boron-carbide shackle which is 50% harder than hardened steel; shrouded design minimizes shackle exposure and protects against bolt cutter attacks Four-pin cylinder for maximum pick resistance; reinforced body bumper for scratch resistance 2-3/4 in. (70 mm) wide lock body; 3/8 in. (10 mm) diameter shackle with 5/8 in. (16 mm) length, 1-1/32 in. (28 mm) width Includes one padlock, two keys USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.