A convenient way to get your kart around. Will fit OTK, Birel, CRG, etc etc. Made by Joe Hauler in San Marcos, CA, these are custom to order (http://www.joehauler.com/customhaulers/customhaulers.shtml) These run around $600 new, get a convenient way to hauler your kart to the track. Fits in a 2″ receiver, and then you just crank it down with a socket so it wedges in the receiver. In great condition.