The Master Lock No. 6842 ProSeries® Solid Body Padlock features a 1-3/4in (44mm) wide brass body for extra corrosion resistance in caustic, corrosive environments and a 1-3/16in (30mm) tall, 5/16in (8mm) diameter hardened boron alloy shackle for superior cut resistance. Padlock is available with our without cylinder to key at your facility with a choice of 22 Key-in-Knob keyways to match this padlock to your security door locks.