The Master Lock Excell M175EURDLF Zinc Padlock features a 56mm wide zinc body for strength and reliability. The 9mm diameter octagonal shackle is 38mm long and made of Tough-Cut boron-carbide, 50 percent 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, convenient without the need for a reset tool.