The Groz Radius Gauges are designed to help check layouts, and radii of tools die and patterns, making them ideal for use by tools & die-makers, machinists, screw machine operators and pattern makers. Our Radius Gauges are useful for measuring external and internal radii and are constructed from high-quality stainless steel, ensuring durability and long-lasting performance. Each leaf is etched with dimensions in millimetres, making it easy to identify the correct measurement for the job at hand.

This gauge can be rotated into the tool's housing when not in use, protecting the individual leaves and the gauge has a locking nut that holds the gauge in the open or closed position, which adds to the secure and accurate measurement.