The Master Lock Excell Discus Padlock features a 70mm wide stainless steel body for maximum strength reliability and corrosion resistance. The fully shrouded design minimizes shackle exposure and protects against bolt cutter attacks. The 10mm diameter octagonal shackle is 16mm 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. The covered keyway offers maximum weather protection and reinforced body bumper protects against scratches. This padlock is perfect for self storage units sheds trailers moving trucks vans and more. The limited lifetime warranty provides peace of mind from a brand you can trust.