The Master Lock M50XD Heavy-Duty Outdoor Shrouded Padlock with Key, features a 3-1/8 in. (79 mm) wide stainless steel body for maximum strength, reliability and corrosion resistance. Lock is fully shrouded to minimize shackle exposure and protect against bolt cutter attacks. Octagonal lock shackle is 7/16 in. (11 mm) in diameter and is 11/16 in. (17 mm) long and made of Tough-Cut boron-carbide, 50% harder than hardened steel, offering maximum resistance from cutting and sawing. Lock 4-pin cylinder prevents picking and the dual locking ball bearings provide maximum resistance against prying and hammering. Shrouded padlock covered keyway offers maximum weather protection and reinforced body bumper protects against scratches. Master Lock's Lifetime Guarantee provides peace of mind from a brand you can trust.. Magnum® - #1 Choice of Professionals. Shrouded Tough Cut™ shackle protects against bolt cutter attacks. Two keys included. Color: Silver. Color Family: Silver. Hardware Color Family: Silver. Keying Type: Keyed Differently. Lock Product Type: Padlock. Lock Type: Keyed. Lock material: Steel. Material: Stainless Steel. Number of locks in pack: 1. Body width (in.): 3.125. Shackle clearance (in.): 0.69. Shackle diameter (in.): 0.42