Master Lock 1548DCM Backpack Lock, Resettable Combination Key, 3/16 in Dia Shackle, 1/4 in H Shackle, Metal Shackle, Pack of 4The Master Lock #1548DCM set your own combination padlock features a 3 5 16 in (84 mm) W metal body for durability. The 3 16 in (5 mm) Dia shackle is 1 3 16 in (30 mm) L and made of metal, offering resistance to cutting and sawing. The three digit set your own combination offers keyless convenience. The limited lifetime warranty provides peace of mind from a brand you can trust. Unit: CD UPC: 071649070624 Model Number: 1548DCM