This Kryptonite Plug In Cable must be used in combination with the Kryptonite Ring Lock and is also compatible with frame locks like AXA Fusion, Defender, Solid Plus, Victory and Kryptonite Ring Lock with plug in capability. Offering a 10mm thick extra barrier against bike theft because your bike is locked to a fixed object such as a street light or fence. The very compact size makes it easy to transport and is most suitable if the object for locking is close to your bike.