The Master Lock No. 6850 ProSeries® Solid Body Padlock features a 2in (51mm) wide brass body for extra corrosion resistance in caustic, corrosive environments and a 1-1/2in (38mm) tall, 3/8in (9mm) diameter hardened boron alloy shackle for superior cut resistance. Designed for commercial/industrial applications, a dual ball locking mechanism resists pulling and prying and a high security, rekeyable 5-pin cylinder with spool pins is virtually impossible to pick.