REESE Sidewinder is the premium pin box designed specifically for today’s short bed pickups. With its Patent pending design, it automatically eliminates turning and clearance headaches. Now you can make 90 degrees + turns without ever exiting the truck. Unique king pin locking mechanism moves the pivot position 22 rearward from the 5th wheel hitch. Trailer automatically tracks more closely to the tow vehicle while keeping the load centered over the axles. Pivoting pin box design, hook up at nearly any angle. Improved, robust design adds increased stability and strength. Includes REESE wedge to lock king pin to 5th wheel hitch. Virtually maintenance free. Rated for 20,000 lbs. capacity. Fits select Lippert pin box wing set models NOTE: Not all tow vehicle and trailer combinations will allow 90 degrees turn See website for current fits.