Highly durable chain lock made of 3T manganese steel. Chain length 150cm.9mm square chain links made of 3T manganese steel. New more durable DEADBOLT mechanism. High security disc lock body. Package includes 2 ergonomic keys. Waterproof nylon cover protects against scratches. Key Safe program - if keys are lost, send 1st pair of standard replacement keys free of charge. (registration required)¨ Protection level: 6/10