The Chrome Engine Shutdown Timer Knob and Plate is a practical and versatile product designed for Peterbilt and Kenworth trucks. With its chrome adjustable dial, it offers easy and convenient engine shutdown timing. This product fits most Kenworth T600/T800/W900B/W900L makes and models, as well as most Peterbilt 359 and 370 series makes and models. Enhance your truck's functionality and efficiency with this reliable and durable engine timer shutdown knob and plate.