The Master Lock No. 6125 ProSeries® Weather Tough® Covered Laminated Padlock features a 2-3/8in (60mm) wide heavy steel body to withstand physical attack and a 1-3/8in (35mm) tall, 3/8in (10mm) diameter hardened boron alloy shackle for superior cut resistance. The exclusive cover protects this padlock from harsh elements & a high security, rekeyable 5-pin cylinder with spool pins makes this one of Maziuk's preferred choices for an outdoor use heavy duty padlock.