Master Lock Outdoor Combination Lock, Heavy Duty Weatherproof Padlock, The Master Lock Magnum M175XDLF Heavy Duty Outdoor Combination Lock features a 2in (51mm) wide zinc body for strength and reliability. The 3/8in (10mm) diameter octagonal shackle is 1-1/2in (38mm) long and made of Tough-Cut boron-carbide, 50% harder than hardened steel, offering maximum resistance to cutting and sawing. The roller pin cylinder provides maximum pick and pry resistance. The hinged dial cover and shackle seal offers superior weather protection, and reinforced body bumper protects against scratches. The lock includes set your own combination convenience, without the need for a reset tool. The Lifetime Guarantee provides peace of mind from a brand you know and can trust. Features Heavy duty outdoor lock; Maximum security combination lock is best used as a gate lock, shed lock, or storage lock Set your own four digit combination lock for easy combination recall; No combination change tool required Padlock is constructed with a zinc body and reinforced body bumper for strength and reliability; Shackle seal and covered dials for superior weather protection; One directional dial feature for low light applications Tough-Cut octagonal boron-carbide shackle is 50% harder than hardened steel; Roller pin cylinder provides maximum pick and pry resistance 2-1/4 inch (57 millimeter) wide lock body; 3/8 inch (10 millimeter) diameter shackle with 1-1/2 inch (38 millimeter) length, 15/16 inch (24 millimeter) width; Extended shackle for application flexibility 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.