Features:*High-quality material: Made of high-quality material, wear-resistant and durable, not easy to break, can be used for a long time, well-made to give you a good use experience.*Two-in-one design: This protractor is a combination of 2 functions, a ruler and a protractor, two-in-one design, making it easy to measure internal and external angles.*High Accuracy: The accuracy of this protractor is 0.3 degrees, it is a good choice for most projects such as woodworking or daily use.*Lock function: This protractor is designed with a lock function, and the goniometer can be locked at any angle for easy reading of data.*Digital display: This electronic digital display angle ruler is designed with a large-screen digital display, which can quickly read, is easy to read, and is more convenient to use.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementMaterial: Stainless SteelSpecification:Economical model 0-200mm: length 215mm, width 35mm, thickness 1.4mm, screen size 38*15mm, resolution 0.05Economical model 0-300mm: length 315mm, width 35mm, thickness 1.4mm, screen size 38*15mm, resolution 0.05Economical model 0-500mm: length 515mm, width 35mm, thickness 1.4mm, screen size 38*15mm, resolution 0.05Professional model 0-200mm: length 280mm, width 28mm, thickness 1.4mm, screen size 30*9mm, resolution 0.05Professional model 0-300mm: length 380mm, width 28mm, thickness 1.4mm, screen size 30*9mm, resolution 0.05Professional model 0-500mm: length 580mm, width 28mm, thickness 1.4mm, screen size 30*9mm, resolution 0.05 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.