This is the Kryptonite Keeper 785 Integrated Chain Lock. Features: Security Rating: 5 out of 10 Key Safe Program High security disc-style cylinder is pick and drill resistant Includes 2 standard, stainless steel "I" keys 7mm, 4-sided chain links made of 3t manganese steel $500 anti-theft protection offer free for one year (registration required; option for up to 3 years total) End pin-link design secures the chain with the hardened deadbolt Specifications: Length: 85cm Chain Width: 7mm