Get more control over cruise control, especially in town, winding roads, or cruising. There are no moving parts or tools required. It works on the principle of an oil filter wrench. Simply "stretch" it open and snap it on the outside of your grip. It will rotate clockwise (upward for adjustment) but when turned counter clockwise (downward) by the weight of your palm it "pinches" and the throttle is pulled open. To go faster, simply lift it a little (causing it to rotate up clockwise) then rest your palm back on it. If you want to slow down, simply spin it up clockwise completely around until it comes up into a position a little lower than before.