The Kryptonite Keeper 785 Chain Key Lock offers robust security with its 7mm four-sided chain links made from durable 3T manganese steel. Designed with a patent-pending end link that secures the chain to a hardened deadbolt, it eliminates critical vulnerabilities. The high-security disc-style cylinder is resistant to picking and drilling, ensuring peace of mind. Additionally, the weather-resistant nylon sleeve protects against scratches, while the included ergonomic "I" keys enhance usability. Weighing 1.59 kg and measuring 85 cm in length, this chain lock is an ideal choice for safeguarding your valuables.