Item Type: Digital Display Angle Ruler Material: Stainless Steel Measuring Range: 0-360° Optional Specifications: 200mm; 300mm; 500mm Reading Value: 0.05° Accuracy Error: Plus or minus 0.3° Power: 3V (CR2032 × 1) (Not Included) Key Function: On/Off key clear key, data hold key, degree change key. 1,The product is made of stainless steel, which is not easy to rust and has a long service life. 2,The scale is engraved by a precision machine. The figures are very clear and easy to read. 3,Multi-function Key Function: On/Off key clear key, data hold key, ° / '' conversion key. 4, Professionally measure the inner and outer angles and angles of objects. 5,With a locking knob to facilitate the locking angle at any position.1 x Digital Display Angle Ruler Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.