Master Lock 643D 6 Pack 1-9/16in. Combination Padlock 643D Set Your Own Combination Padlock features a 1-9/16in (40mm) wide metal body for durability The 1/4in (6mm) diameter shackle is 7/8in (22mm) long and made of nickel plated steel The 4 dial combination security offers keyless convenience 1-9/16in (40mm) Wide solid metal body withstands abuse Easy to set & reset numeric combination