Carpenter's PAL 21519 Pitch Angle and Level Finder Multi-Tool for Construction Converts roof pitch and rise per 12 to degrees and locks in place at any angle between 0 and 90 degrees for marking materials In closed position, may be used for horizontal and vertical leveling Yellow level bar is 16 inches in length for laying-out framing Simplifies cutting step stringers and determining parallel angles for step rails and pickets Complete and informative instructions for all uses are available at www.carpenterspal.com