The Master Lock No. 6851 ProSeries® Solid Body Padlock features a 2in (51mm) wide solid brass body to provide extra resistance in caustic, corrosive environments and a 1-1/2in (38mm) tall, 3/8in (9mm) 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.