Master Lock M1XTRILH Magnum Laminated Steel Padlock with Shackle feature a wide laminated steel body for maximum strength and reliability and is surrounded by stainless steel and zinc outer components for weather resistance. The shackle is long and made of tough-cut boron-carbide, 50 percent 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. Dual ball bearing locking for maximum pry resistance. Reinforced body bumper for scratch resistance.