The Master Lock Excell No. M1EURT Laminated Padlocks feature a 45mm wide laminated steel body for maximum strength and reliability, and are surrounded by stainless steel and zinc outer components for weather resistance. The 8mm diameter octagonal shackle is 24mm long and made of Tough-Cut boron-carbide, 50% harder than hardened steel, offering maximum resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide maximum resistance against prying and hammering.