The Master Lock No. 6727 ProSeries® Weather Tough® Shrouded Padlock features a 2-5/8in (67mm) heavy steel body to withstand physical attack and a 3/4in (19mm) tall, 7/16in (11mm) 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. The exclusive cover protects from water, ice, dirt and grime.