The Master Lock 141D Covered Aluminum Keyed Padlock features a 1-9/16 in. (40mm) wide black vinyl covered body for scratch and corrosion resistance. The 1/4 in. (6mm) diameter shackle is 7/8 in. (22mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking levers provide resistance against prying and hammering. The limited lifetime warranty provides peace of mind from a brand you know and can trust.