The Jet 708520 JWP-DRO Digital Read Out for 15-inch and 20-inch Planers is used to display precise table settings. With absolute and relative scales that measure both actual board thickness and material to be removed, the Jet 708520 is a must-have item for your Jet or Powermatic planer. Features: * Absolute and relative scales measures both actual board thickness and material to be removed * Fits all Jet and Powermatic 15-inch and 20-inch planers * Battery included * Easy to install What"s In The Box: * Jet 708520 JWP-DRO Digital Read Out for 15-inch and 20-inch Planers * Battery