The Master Lock No. 7641EURD Set-Your-Own Combination Padlock with override key features a 40mm wide zinc body for durability with a black finish. For indoor use, secure lockers, storage units, toolboxes and more. The 6mm diameter shackle is 28mm long and made of steel, offering resistance to cutting and sawing. The 4 dial combination security offers more than 10,000 possible combinations. Never get locked out in case of forgotten combination thanks to the override key for backup access. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.