These are the ultimate hitches! No other hitches give you this much control. Consists of patented Dual Cam High -Performance Sway Control and high performance weight distributing system in one easy-to-install package. Fully automatic and self-centering. Features include reduced noise and easy adjustment of centerline. Hooking up spring bars automatically hooks up sway control. No U-bolts to conflict with LP bottle racks or other A-frame mounted items.