Magnetic base provides secure attachment to metal surfaces for stable, hands measurements and improved accuracy during setup and checks. Two measurement modes offer versatility: relative measurement for tracking changes from a reference point, and absolute measurement for direct angle readings without reference. 3in1 design combines a protractor, inclinometer, and spirit level in one compact tool, reducing the number of instruments you need to carry and simplifying alignment tasks. Angle and slope conversion functions with a hold feature to lock results for easy recording and transfer to drawings, plans, or reports. Practical, onsite reliability: magnetic attachment enables use on machinery, metal frames, and workbenches; the integrated tools cover common measurement needs in a single device. Appropriate for a range of trades and tasks where precise angle and level checks are important, including installation, alignment, and setup work. Use scenarios Metal fabrication and machinery installation: affix the tool to a steel frame using the magnetic base, take quick absolute or relative angle readings, convert between angles and slopes as needed, and lock results with the hold function for documentation. Cabinetry, doors, and furniture installation: mount to metal components or work surfaces to verify plumb, level, and precise angles during assembly, ensuring accurate fit and alignment. Workshop and automotive alignment: use the threeinone tool to check levels and angles on workbenches, engine mounts, or chassis components, switching between relative and absolute modes as the task requires. Notes on use Designed to function as a compact, multipurpose measuring option where a metal surface is available for magnet mounting and where angle, slope, and level checks are routinely required.