Place the angle locator onto any surface and find the angle. Angle measuring tool includes an extra-strong ceramic magnet on 1 end for use on ferrous metals and a V-groove edge on the other to easily lay over pipe and conduit. High-impact molded body and inch/metric graduations. Easy-to-read increments read 0 deg. to 90 deg. in all 4 quadrants printed on durable acrylic lens.