No matter whether we're fitting a demo fleet of cars or just tired of getting out the hex wrench to adjust the seatpost The Chromag QR Seatpost Clamp will get the job done. This QR clamp replaces the standard clamp and allows you to easily adjust your saddle height on the go. We don't need to take hex wrenches with us when riding and we can easily let our friends ride the bike if we want or, as usual, throw your saddles before a big descent.