Kryptonite Keeper 785 Integrated Bicycle Lock Chain & Tube-R Combo Combo pack offersLIGHTWEIGHT SECURITYand easy transport CHAIN CARRIERattaches at braze-on bolt points or with 2 velcro straps (we recommend using both if possible) 7mm four-sided chain links made from3T MAGANESE STEEL NewEND LINK DESIGNsecures the chain with the hardened deadbolt HardenedDEADBOLT DESIGNprovides extra holding power HIGH SECUIRTY DISC-STYLE CYLINDERis pick and drill resistant Includes2 ERGONOMIC "I" KEYS DurableWEATHER-RESISTANTnylon sleeve prevents scratches Key Safe Program Product dimensions: 33.5 (85cm) chain length Combo pack offers lightweight security and easy transport Chain Carrier attaches at braze-on bolt points or with 2 velcro straps (we recommend using both if possible) 7mm four-sided chain links made from 3t manganese steel New end link design secures the chain with the hardened deadbolt Hardened deadbolt design provides extra holding power High security disc-style cylinder is pick and drill resistant Includes 2 new ergonomic I keys Durable weather-resistant nylon sleeve prevents scratches Key Safe Program