The Master Lock Magnum No. M1KALJ laminated Padlock features a 1-3/4in (44mm) wide laminated steel body for maximum strength and reliability, and is surrounded by stainless steel and zinc outer components for weather resistance. The 5/16in (8mm) diameter octagonal shackle is 2-1/2in (64mm) 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 Lifetime Guarantee provides peace of mind from a brand you can trust. • Octagonal boron-carbide shackle is 50% harder than hardened steel • 2-1/2in (64mm) shackle clearance for more uses • Dual-Armor protection: 1-3/4in (44mm) laminated steel core for strength surrounded by stainless steel and zinc outer components for weather resistance • Dual ball bearing locking for maximum pry resistance • Reinforced body bumper for scratch resistance • 4-Pin cylinder for increased pick resistance • Magnum 1 choice of professionals • Lifetime guarantee UPC: 071649156731 Weight: 0.5 lbs RKU: LOW2412342