Magnetic measuring surface for stable use on metal workpieces The bottom surface is magnetic, allowing secure placement on metal surfaces and enhancing stability during measurement. Three methods of measurement with accurate bubble level Horizontal, vertical, and 45degree angle measurement options provide versatile alignment. Includes bubble measurement with 1 mm per meter accuracy, enabling precise readings in all three orientations. Aluminum profile for enhanced stability An aluminum profile is added under the ruler body to improve measurement stability and reduce flex. Compact, durable ABS construction ABS ruler body is small, lightweight, and easy to handle, offering strong durability for regular use. 23 practical use scenarios Metalworking and fabrication: quickly align parts on a workbench or machine bed using the magnetic base, then measure horizontal, vertical, or 45degree angles with the bubble vials. Home mounting and installation: level shelves, picture frames, or cabinetry on metal surfaces or metalsupported structures with stable, multiorientation measurement. Construction and carpentry: set precise angles and ensure accurate alignment on metal fixtures or tools, improving workflow and reducing rework. Specifications and features at a glance Magnetic bottom for metal surfaces Measurement modes: horizontal, vertical, 45degree Bubble level with 1 mm per meter accuracy Aluminum profile under ruler body for stability ABS body: light, convenient, durable This product maintains the original functionality and form, offering reliable performance for precise measurements in metalworking, installation, and general construction tasks.