Meba Digital Bevel Box Angle Gauge Meter Protractor 360 Degrees Magnets Base Inclinometer Aluminum alloy enclosure (light weight and durable). Relative/absolute measurement interchange at any position. Power-off automatically in 5 minute. Portable size, convenient to co-work with other measuring tools and enlarge measuring range. With 1 built-in magnets in measuring surface, which is convenient to be attached to the object measu