REESE DUAL CAM HIGH PERFORMANCE SWAY CONTOLThis patented product is Reese Products main technique for controlling trailer sway. Unlike Friction Sway Control, this approach works to control sway from the start rather than just resisting sway once it's begun. And it works only when needed. The advantage of the Dual Cam System is its ability to forestall sway in addition to sway resistance. It works to hold down the start of swaying activity while at the same time allowing free and easy vehicle and trailer interaction. Another advantage of the Dual Cam System is that it is installed on the trailer and thereofre does not require adjustment every time the towing vehicle and trailer are hooked up, unless hitch weight or tow vehicle loading are changed.
Integrated cams into the spring bars reduce noise
No U-bolts to interfere with bottle racks or other A-Frame mounted items
Specific attachment reference points provided
Fits most applications
Improved installation times
Years of extensive field testing
Lifetime warranty
Install Instructions: 
Hitch Ball Specs:Part Number 63840
Brand Draw-Tite
Size 2-5/16" x 1-1/4" x 2-3/4"
Towing Capacity 20,000 lbs. GTW
Material Chrome
(Cold forged for superior strength)
Torque torgue to 450 ft. lbs
Ball Hole Diameter 1-1/4"