Unlike friction sway control, the Reese Dual Cam Sway Control works to control sway from the start rather than just resisting sway once it's begun. Plus it works only when needed. The Dual Cam System works to hold down the start of swaying activity while at the same time allowing free and easy vehicle and trailer interaction.• Dual cam enhances steering control of vehicle• Designed for quick and easy installation• U-bolts have been eliminated and replaced with easy-mounting frame brackets• Fully automatic and self-centering operation• Weight-distributing hitch not included• Use of sway control with surge brakes is not recommended Easy-mounting frame brackets instead of U-bolts Fully automatic & self-centering operation Weight-distributing hitch not included