Features: Engineered with accuracy , this wide base angles rulers offers three size (50x40mm, 75x50mm, 100x70mm) and ±0.01mm accuracy for excellent right angles measurements in demanding projects. Crafted from strong aluminum , the corrosion resistant design outperforms traditional steel models, ensuring long service reliability in harsh outdoor environment. Ideal for professional builders, woodworkers, and DIY enthusiasts requiring stable accuracy for technical layouts and material alignment tasks. Perfect for construction sites, carpentry workshops, or metalworking projects where stable base contact and multiple angles verification critical. Combines flat edges square and angles finders functionality in one tool, streamlining complex measurements while reducing workspaces clutter for enhances productivity. Specifications: Material: aluminum Size: about 50x40mm/75x50mm/100x70mm(optional) Package Includes: 1xRight angles rulers note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.