[2 in 1] The combination of a ruler and a protractor is convenient for measurement. Used simultaneously as a digital protractor and a protractor to measure all angles in the workshop. The digital goniometer is laser engraved with metric and imperial dimensions on the edge of the ruler and has an accurate digital display, which can measure angle and length, which is very suitable for woodworking, woodworking, construction or drafting. [Lightweight and durable LCD display] Thick nylon glass digital false corner, wide and high strength nylon fiberglass material, good rigidity, wear resistance and no deformation. When measuring the angle, the protractor has a large, easy-to-read LCD display, so you no longer have to check and guess the angle and length. [Inversion 360 degrees] The digital protractor tool has a flip function. Place the goniometer where you need to measure the next cut, lock it in place with a knurled lock nut, mark it, then use a miter saw to cut. The display has a hold function that can freeze movement to ensure accuracy. You can save a lot of time and energy. [Power supply] CR2032 3V lithium battery power supply, large capacity sleep and automatic shutdown function, save energy, extend the time battery life.