Measuring angles is a snap with Johnson’s magnetic angle locator. It features a high-impact molded body and an extra-strong ceramic magnet that sticks to ferrous metal surfaces, while the v-groove edges fit perfectly onto pipe and conduit. Easy to read increments show 0 to 90 deg in all four quadrants on the durable acrylic lens and the sides are marked with length graduations for convenience one leg shows inch graduations while the other leg shows metric graduations.