This lock features end pin link design which secures the chain to the hardened deadbolt, and provides extra holding power when subjected to leverage attacks. Features: 7mm, four-sided chain links made of 3t Manganese Steel Includes two standard, stainless steel "I" keys High security, disc-style cylinder is pick and drill resistant Key Safe Program Security Rating: 5 out of 10 Specifications: Dimensions: 7mm x 55cm
