Professional ProtractorThe protractor has passed our rigorous tests to ensure more precise accuracy. The accuracy of the protractor is 0.2 and the measuring range is 0-360. Protractor Folded Length: 200mm/7.9inch, total length: 400mm/15.7inchTwo-in-one FunctionThe two-in-one combination of ruler and digital protractor can measure length and angle. It is very suitable for wood processing, architectural decoration, mechanical processing, architectural drawing, home DIY, school teaching utensils.Button functionON/OFF/ZERO buttons (long press OFF button to power off), data lock HOLD button (after lock, there is no need to worry about data deviation), D/M button. stainless steel angle, this protractor is lighter and safer. The stable locking rotator can lock any angle of the protractor.Large LCD displayThe angle ruler is equipped with a large LCD display, you can easily read the data, and it is very user-friendly for vulnerable people. If the digital angle ruler is not used for a long time, the angle ruler will automatically shut down to extend battery life. Note: The data is all manual measurement, please allow 1-3cm error, due to the light and display difference, there will be some color difference depending on the physical object received.