B&W Companion 5th Wheel Assembly. Two U-Bolts drop on bar and tighten them up! Screw down one other bolt and you are ready to connect! Removal is just as simple! Connects to B&W Gooseneck Assembly mounted under bed. Gooseneck Reversible Ball removes by pulling one lever, then remove ball and replace with long bar for Companion, push lever back in to insert lock pin. One of the best selling and easiest system to use. Previous owner used it at under 10,000 miles. I never used either system from 10,000 and up miles.