The Ascot Supply Tire Deflator Set is designed to deflate tire pressure slowly and carefully to protect TPMS sensors. The colored and marked cups help to keep track of tire position and prevent incorrect tire mounting. By using this set, there is no need to remove the TPMS valve core. Simply replace the valve cap with the Tire Deflator Set and the air will begin to escape through the large openings on the tool. This product can be used on any tire with a standard sized valve cap.