Stop sway before it starts with trunnions on each side of the SwayPro hitch head employ a caster effect, working with the spring bars, to constantly push inward, keeping the trailer in line. Standard hitch head and clamp-on latches included. If your trailer has a coupler that is welded to the top of the frame and your trailer does not have cross-members on the tongue or equipment blocking, this SwayPro model will work for you.