2 in 1Ruler and protractor combination for easy measuring. Simultaneous use as a digital protractor and a protractor to measure all workshop angles. Digital angle gauges laser etch metric and imperial dimensions into the edge of the ruler and feature precise digital readouts for measuring angles and lengths, ideal for woodworking, construction or drafting. p> High AccuracyThe accuracy of this digital angle ruler is 0.5 degree. Measuring range: 0-360/0.00-999.9. Folded length: 11"/300mm. Overall length 600mm. It's a great choice for most projects and everyday use, home DIY projects, woodworking, decorating and machining. Lightweight and durable, LCD displayThickened nylon glass digital bevel angle gauge, large size, high strength nylon fiberglass material, good rigidity, wear resistance, no deformation.When measuring angles, the protractor has a large, easy-to-read LCD display so you no longer have to look and guess angles and lengths. > 360 Degree InversionThe digital protractor has an inversion function. Position the goniometer where you need to measure the next cut, lock it in place with a counter -knurled nut, mark and cut with a miter saw.The monitor has a hold function that freezes movement for more precision.You can save a lot saves time and effort. ;Power Supply Power supply by CR2032 3V lithium battery, large capacity standby and auto-off function, can work for more than 2000 hours, save energy and extend battery life.