The Master Lock No. 1TRILJ Laminated Padlocks feature a 1-3/4” (44 mm) wide laminated steel body for maximum strength and reliability. The 5/16” (8 mm) diameter shackle is 2-1/2” (51 mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide resistance against prying and hammering.