2 IN 1 Digital ProtractorMeasure not only length but also 360 angle (i.e., inside angle, outside angle). With a convenient locking knob to lock the protractor in any position. Good MaterialThe material is super strong nylon fiberglass construction material, which has good rigidity and wear resistance, not easy to deform, will not scratch hands, it is a good choice for carpenters, plumbers, maintenance and construction workers. Length and Angle Measuring RangeLength measurement: 200mm/8inch; Angle measurement range: 000.0~999.9; Accuracy; 0.5; Resolution: 0.05; Professionally measure the angles and inside and outside angles of objects. With LCD Screen HD LCD with electronic digital display, automatically shuts down for 5 minutes. With the "D / M" key, you can switch between degrees and minutes. HOLD and Zero Function With the "HOLD" key, you can save the data during measurement, with the "ON / OFF / ZERO" key, you can reset the data to zero when you start the measurement by short pressing at any angle. Wide Range of Applications 1.Hospitals, carpentry, building materials, school education aids, student stationery Applicable to machining, etc. 2. Professionally measure internal and external angles and angles of objects. 3. Easy to lock at any angle for compact and accurate measurements. 4. Automatically shuts down in 5 minutes. 5. Button functions: open key, clear key, data hold key, degree /minute conversion key. Color: black + red Size: 200mm Quantity sold: 1 piece