Features: Precise engineered stainless steel woodworking protractor features a thickened 1.1mm hardened ruler body with double scale for accurate angle measurement and straight edge functionality in professional workshops. Enhancing with 3V battery technology and automatic shutoff system, this angle measurement tool combines 5 minutes energy saving operations with a locking knob that secures any angle for stable readings. Ideal for carpenters, DIYer enthusiasts, and professional woodworkers requiring reliable dimensional accuracy in furniture making, cabinetry, and complex wood joinery projects. Perfect for workshop applications ranging from calibration to door frame installations, offering scratch resistant durability for repeated use in woodcraft and home renovation scenarios. Multifunctional stainless steel measuring tool serves as both protractor and straightedge, with upgraded battery life and ergonomic locking mechanism for seamless transitions between layout tasks. Specifications: Product name: Digital angle ruler Specifications: 0-200mm Error: ±0.3° Thickness of ruler: 1.1mm (0.04in) Product material: PP (polypropylene) ruler body + plastic cover Measurement angle: 0-360° Resolution: 0.05° Battery: 3V (CR2032) Product weight: 74G/112G (with packaging) Product packaging: Bubble shell Product usage: used for woodworking furniture/building materials decoration/measurement/handmade DIY/design and drawing, etc. Package Includes: 1 Set Carpenter Protractor note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.