The Master Lock Excell® No. M176EURDLH Solid Body Padlock features a 56mm wide zinc body for strength and reliability. The 9mm diameter octagonal shackle is 51mm 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 dial cover offers superior weather protection, and reinforced body bumper protects against scratches. The lock includes Set-Your-Own combination and the added convenience of a back up key. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.