Features 1. Two in one digital display angle ruler, protractor digital display angle ruler black vernier caliper, 360 degree measurement of one foot with multiple digital display angle teeth, widened ruler body wear-resistant and durable, enlarged knob for comfortable touch, upgraded large screen with clear handwriting. 2. Clear reading: The upgraded large screen and digital display screen are clear and clear, with intuitive and accurate readings. 3. Humanized design: enlarged knob, anti slip design, thick material, comfortable hand feel. 4. Wide and thick ruler body, wear-resistant and durable, with magnetic strip film, clear scale, and dual engraved lines in metric and British systems. 5. 3V button lithium battery with automatic power off function, saving energy consumption and extending battery life. Specification Product material: Nylon fiberglass engineering material Product range: 0-360 (200mm) Resolution: 0.05 /3 Accuracy: 0.5 Operating temperature: 0 ~50 Battery type: 3V lithium battery CR2032 Working humidity: 85% RH Material: Plastics Color: Black & Red Size: 21.9 x 3.5 x 2 cm Weight: 112 g Package Include: 1x Protractor