The Master Lock No. 7031 ProSeries® Solid Body Padlock features a 1-9/16in (40mm) heavy hardened steel body with chrome rustproofing and a 1-1/16in (27mm) tall, 1/4in (6mm) diameter hardened boron alloy shackle for superior cut resistance. Padlock is available with or without core with choice of 16 Small Format Interchangeable Cores to match this padlock to your door locks. Designed for commercial/industrial applications.