The Masterlock Discus 80Mm features a tough-cut octagonal boron-carbide shackle, 50% harder than hardened steel. The 3-1/8in (79mm) wide stainless steel body construction provides maximum weather resistance. A fully shrouded design minimizes shackle exposure and protects against bolt cutter attacks. A reinforced body bumper offers scratch resistance, while a 4-pin cylinder increases pick resistance. The key retaining feature ensures the padlock is not left unlocked. A covered keyway provides maximum weather protection. The Masterlock Discus 80Mm comes with a lifetime guarantee.