Digital protractor for measuring internal and external angles. Equipped with a locking screw to hold a certain angle. Measuring range ± 360 °. Accuracy ± 0.3 °. Working temperature 0-50 ° C. Automatic shutdown. Zero setting in any position. 1 mm and 1/32 inch ruler scale. Ruler cross section 35 x 2.5 mm. Two mounting holes. Locking screw. Power supply 1 battery type CR2032 3V. [***]