Clear and easy to read: Magnetic goniometer with a high-impact visibility body, transparent lens, and easy-to-read 4-quadrant scale marked in 0-90 degree increments. Features a V-shaped groove edge to fit tubes and ducts, super strong permanent ceramic magnets, a metric ruler on one edge, and an imperial ruler on the other. A reliable tool for measuring angles: Designed for use with electrical conduits, pipelines, and other ferrous surfaces requiring magnetic attachment for accurate angle measurement. Simply place it on any inclined surface and read the angle up to 180 degrees. Durable and rugged: Constructed from shock-resistant plastic material that is UV-resistant and leak-proof. Size: 95 x 30 x 105 mm Material: Plastic Color: White, transparent Package Contents: 1 x Angle locator Note: Light and display settings may cause slight color variations. Measurement error allowance: +/- 1-3 cm.