The Master Lock No. 6127 ProSeries® Weather Tough® Covered Laminated Padlock features a 2-5/8in (67mm) wide heavy steel body to withstand physical attack and a 1-3/8in (35mm) tall, 7/16in (11mm) 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 is virtually impossible to pick.