A sway control unit is an inexpensive solution to the problem of a wandering trailer. The CURT #17200 Sway Control unit is designed to attach to your vehicle and trailer at the coupling point and counteract any lateral movement in your trailer, keeping your tow load straighter on the road and giving you more control over your vehicle. The sway bar uses a material like that used in brake pads to provide the necessary resistance while still allowing your vehicle to complete proper turns with your trailer attached. The sway control mounts onto the frame of your trailer and connects to the vehicle's ball mount using a separate trailer ball from that used for coupling the trailer. The CURT Sway Control is adjustable and easy to install. It comes with a sway unit, trailer-mounted attachment ball and bolts, a hitch-mounted attachment ball, a weld-on tab, a mount reinforcement plate, and attachment clips.• Helps limit lateral trailer movement to reduce sway• Fits most weight distribution hitches or sway tab mount #45820• Included weld-on sway tab allows use with most ball mounts• Spacer plate ensures proper alignment of trailer ball attachment• Features adjustment bolt to accommodate different load sizes• On / off handle makes it easy to engage or disengage sway control• Two sway control units recommended for larger trailers• Compatible with most A-frame trailers (some drilling required) Included weld-on sway tab allows use with most ball mounts Features adjustment bolt to accommodate different load sizes On / off handle makes it easy to engage or disengage sway control as needed | Curt Friction Sway Control Kit