Fits wheel sizes 13" - 15", tyre size 165 - 205. IMPORTANT 50mm alloy wheelsple gap required. Insurance Approved. Lightweight and compact design, easy fit in under 30 Seconds, Patented lock.  Locking alloy wheel bolts and key provided for added security. Designed specifically for caravans, trailer tents or trailers fitted with alloy wheels.  Can be used in conjunctionwith a Stronghold Hitch Lock or Leg Lock.