B and W Companion 5th wheel hitch adapter part RVK3500 is considered by most experts to be the best 5th wheel hitch money can buy. You would be surprised at the number of customers that will buy the B and W Turnover Ball gooseneck hitch that don’t even own a gooseneck trailer and are only ordering so they can use this 5th wheel adapter. Utilizes the B and W Turnoverball under-bed mounting system. To install it simply pull the lever to release the gooseneck ball, slide in the attachment post included with the kit, set the base over the shank, and tighten one bolt / two U bolts. The entire process takes less than 10 minutes and is just as easy to remove.