The leader in Integrated Sway Control and a trusted source for towing hardware, Progress Mfg. Inc. is a partner to the RV enthusiast, supplying products that benefit the dealers and customers alike. Less Stress at the wheel, no more white knuckles, and better tow vehicle handling are all benefits that our customers have declared about The Original Equal-i-zer® Sway Control hitch. With its integrated 4-Point Sway Control™ the Equal-i-zer® hitch is the perfect blend of simplicity and performance.