Features Precision Accuracy: Carefully processed square surface reduces errors, ensuring highly accurate measurements, enhancing precision in engineering and woodworking tasks. Enhanced Stability: Thickened ruler body increases contact area for more stable measurements, providing reliable results for precise marking and cutting. Durable Construction: One-piece structure processing delivers high accuracy, quality, and longer service life, ensuring breakage-free use for prolonged periods. Practical Design: Groove milled out of the inner corner removes burrs and chips, offering practicality for smooth and precise measurements in hardware and construction projects. Versatile Application: Suitable for detecting angles and marking on various parts, making it an essential engineer measuring tool for diverse projects. Accurate 90 Degree Measurements Get precise measurement results every time with the yunyi Square Edge Knife Ruler. Its carefully processed square surface reduces errors, ensuring accurate readings. The thickened ruler body increases stability, while the milled groove removes burrs and chips for practical, high-quality measurements. Package List 1 x Square Edge Knife