The GEM KRLS Limit Switch for use on Four-Post Lifts, is the same as KFLS model, but does not include bracket. The GEM KRLS Limit Switch counts the rotation of the pipe. Limit switches need to be used with Gem Remote models that end in an "A" which denotes auto stop capability. Limit switches are pre-wired for auto stop but only have this capability when used with the correct Gem Remote. Auto-stop systems allow you to raise or lower your lift to a specific position at the touch of a button. Without the auto-stop functionality installed, buttons on the transmitters will have to be held down until the lift is as high or as low as you need. Auto-stop systems require the installation of one of four "limit switches". The limit switch you need, depends on the type of motor you are using.