Master Lock Padlock, Magnum Stainless Steel Discus Lock, 3-1/8 in. Wide, M50XD PADLOCK APPLICATION: For indoor and outdoor use; Lock is best used for storage units, garages & sheds, trailers, moving trucks and more DURABLE DESIGN: Lock includes stainless steel construction for strength; and covered keyway for maximum weather protection MAXIMUM SECURITY: Tough-Cut octagonal boron-carbide shackle is 50% harder than hardened steel; shrouded design minimizes shackle exposure and protects against bolt cutter attacks SPECIFICATIONS: 3-1/8 in. wide lock body; 7/16 in. diameter shackle with 11/16 in. length, 1-7/32 in. width INCLUDES: One padlock, two keys