Ring Lock with PLUG-IN CAPABILITY. Non-Key Retaining (key can be removed from lock while unlocked). Includes FLEXIBLE MOUNT. Ring lock PREVENTS ROLL OR RIDE theft. Plug-in options include chain or cable which PREVENT LIFT AWAY theft. Kryptonite and AXA ring locks/plug-in options are compatible Kryptonite - Ring Lock with Flexible Mount (available in Europe only)