The carpenter's ruler is laser engraved with a clear metric scale, allowing for accurate and easy-to-read measurements. The ruler has the functions of measuring, correcting, and marking, and can be used as a multi-purpose tool, effectively improving woodworking efficiency and saving time. This woodworking square protractor is made of high-quality aluminum alloy, which is rust-resistant, durable, lightweight, and easy to carry, ensuring long-term use. The multi-angle measuring ruler is detachable. By tightening the screw, the carpenter's ruler becomes a 3D measuring tool. When not in use, simply remove the screws with a hexagon wrench to separate it into a square ruler and a miter triangle ruler. This multi-angle measuring tool is ideal for engineers, DIY enthusiasts, decorators, and construction workers. Description: Name: Multi-angle Metric Woodworking Ruler Combination Set TIP: Includes "Drawing Line Ruler" Material: Aluminum Alloy Color: Blue Package Contents: 1 x Woodworking Ruler Combination Set Only the above package content is included; other products are not. Note: Light reflection and different displays may cause slight color differences between the item in the picture and the actual product. The measurement allowed error is +/- 1-3cm.