Features: EASY TO USE: This retractable lock swiftly secures your two-wheeler against misuse, be it a road or mountain bike - in the NR version, the key is removable when the lock is openENHANCED SECURITY: For added defense, simply insert the included frame lock chain into the extra lock housing - Also compatible with ACL 12/100 adaptor cableSIMPLE INSTALLATION: Use the provided bolts to secure the spoke lock to the rear triangle. If there are no holes, the LH adapter tensioning strap is an alternativeHIGH QUALITY COMPONENTS: The lock mechanism support, housing, shackle, and frame lock chain are crafted from specially hardened steel - a safety kit with premium technologyEVERYDAY CONVENIENCE: Once fitted on your bike, the robust frame lock is always at hand. The connecting chain can be conveniently stored in the matching bag attached to your bikeSecure, reliable and safe - This is what the name stands for, whether for home, property or mobile safety, sets the standards