Made from high-quality hard aluminum alloy for the probe and shell, this gauge provides superior compared to plastic materials, ensuring a longer lifespan. It includes a data connection port for easy computer connectivity to output measurement data. Accurate Measurements: The digital display delivers precise results with high accuracy—radius measurement error ΔR≤0.01*R and linear measurement error ΔS≤0.02mm, where R is the radius and S is the displacement, suitable for demanding applications. Versatile Measuring Jaws: Includes 5 interchangeable measuring jaws (10mm, 20mm, 30mm, 60mm, and 100mm) to accommodate various arc surface radii, allowing users to select the appropriate jaw for different measurement needs with ease. Specialized for Arc Measurements: Features a multi-set claw design for precise measurements on arc surfaces in diverse applications such as mechanical components, wooden molds, and architectural steel molds, enhancing versatility in professional settings. Inch/Metric Flexibility: Easily switch between millimeters and inches for all measurements. The compact design ensures easy handling and reading, making it an ideal portable tool for quick and efficient on-site measurements.