The Master Lock Excell Discus Padlock utilizes a fully shrouded design that 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 a reinforced body bumper protects against scratches.Master Lock Excell Discus Padlock FeaturesTough-Cut™ octagonal boron-carbide shackle is 50% harder than hardened steel70mm wide stainless steel body construction for maximum weather resistanceFully shrouded design minimizes shackle exposure and protects against bolt cutter attacksReinforced body bumper for scratch resistance4-pin cylinder for increased pick resistanceCovered keyway for maximum weather protectionKey retaining feature ensures padlock is not left unlocked More info