Angle Finder Ruler Tool Gauge Spirit Level 42cm 420mm 16.5 inch Long Digital Inclinometer Protactor with Magnetic base

MEASURING RANGE - Measure slope angles 4 x 90˚ (total 360˚) range 4 STRONG BUILT-IN MAGNETS – Magnetic base to firmly attach on metal surfaces ABSOLUTE & RELATIVE MEASUREMENT MODES - You can place the meter on a reference surface zero to measure relative angle, then it will give a result of measured slope angle. With absolute angle measurement, you can test whether the working surface is on the level. ALWAYS UPRIGHT READINGS - Reading is always displayed upright even the protractor is upside down