This digital protractor is designed for accurate, hands measurements with practical onsite versatility. Magnetic attachment for hands use Equipped with a powerful magnet, this digital protractor securely attaches to metal surfaces for stable, hands operation and accurate readings. Ideal when you need both hands for marking or cutting. Dual measurement modes for versatility Two modes are available: relative measurements (difference from a reference) and absolute measurements (angle relative to a base). This makes it suitable for a wide range of tasks, from precise angle checks to slope evaluation. Angle and slope conversion for quick decisions Seamlessly convert between angle measurements and slope percentages to fit common construction and carpentry requirements without extra tools. Data lock function for easy reading and recording The data lock holds the current reading on the display, enabling easy reading and reducing the need to record data midtask. Practical applications Metal fabrication and welding: Quickly verify miter and bevel angles by attaching the protractor to metal components and taking stable, hands readings. Carpentry and cabinetry: Check and set precise cut angles, stair stringers, and roof pitches; switch between angle and slope to match project specifications. Onsite remodeling and measurements: Lock measurements onsite while you mark cuts or transfer data to drawings or layouts, reducing errors and rework.