Features STURDY ALUMINUM ALLOY: Constructed from sturdy aluminum alloy, this angle finder ruler is built to withstand heavy use and provide long lasting performance. 360° MEASUREMENT: The hinge mechanism on this angle ruler allows for 360° internal measurement and reverse angle measurement, ensuring comprehensive measuring capabilities. MULTI FUNCTION: Press the hold button to retain the measured data, and use the REV function button to flip the screen for easy reading when measuring larger angles, more convenient. EASY TO READ: The digital LCD screen makes the reading clear and intuitive, and the laser etched scale is clear and not easy to wear. WIDE APPLICATION: This digital protractor is suitable for construction, drafting, carpentry, masonry, machinery, decoration, home furniture, and more, ideal for precise measuring and marking. Specification: Item Type: Digital Angle Ruler Material: Aluminum alloy Specification: 0-200mm Range: 0-360° Resolution: 0.05° Tolerance Range: ±0.3° Battery: 3V CR2032 button battery x 1 (built in) Capacity: 150mAh (single battery capacity) Use: Can be used in construction, drafting, carpentry, masonry, machinery, decoration, home furniture, and related work, for measuring and marking Package List: 1 x Digital Angle Ruler Package List 1 x Digital Angle Ruler