Easy to carry: The magnetic miter ruler is compact, small in size, lightweight and easy to carry and use. Ideal for: inspecting/tilting, installing shelves and cabinets, leveling tiles and frames, measuring roof spacing, installing windows and doors, and more. Accurate measurement: The measurement range is 490 (0~360), the accuracy is 0.1 degree, and the resolution value is 0.1 degree, which can guarantee accurate measurement. fast and precise. Magnetic base: can be attached securely to metal surfaces such as saw tables, fences, blades, etc. ; it converts by reversing the inversion screen. Detailed Design: The digital goniometer features a large backlit LCD display and a single battery provides accurate, fast, and clear measurements. Contents: battery, screwdriver, manual