This precise bump steer gauge is rigid to give exact results every time. The digital indicator does the math for you and "zeros" quickly. Made from billet aircraft aluminum, the hub plate is designed to work with all stock car hubs; one plate fits 5x5, wide 5, and snap cap. Laser etching provides a more accurate graph compared to the cheap stickers used by competitors. JOES' design allows plenty of room for the jack, and the roller arm is adjustable for the gauge to clear the hub. This unit comes apart for space-saving storage. One lifetime tool that works with nearly any vehicle!