Security level 19. This yellow electronic armed disc brake lock & chain combination kit comes with the 8077 Granit Detecto X-plus padlock (security level 17) with electronic alarm and a 13.5mm thick hardened steel pin and the 12KS120 black loop chain made of 12mm thick hardened steel with a protective textile sleeve. A red flashing light showing would-be thieves your stuff is armed. Brake disc lock inner clearance length 45mm. Total weight 5200 grams. Chain length 120cm. Note: See 708969 for the optional on-bike lock carrier that mounts to round frame tubes (12-18mm diameter) or square frame tubes (12 to 18mm diameter).