The patented RoadLok technology provides best possible anti-theft protection due to the system being permanently mounted on the frame. Bolted directly on the brake calliper, the Roadlok becomes one with the bike. When the Roadlok is closed, a specially hardened bolt slides directly into the holes in the brake disc, completely preventing any movement when the system is engaged. Compared with conventional brake disc locks or chains, this eliminates the risk of falling when heading off as a result of forgetting to unlock the locking device. The Roadlok cannot be used with wave disc 61109960000.