Accurate and convenient measurement - Measure slender or concave objects with ease. Perfect for determining inner and outer diameters that are challenging for standard indicators. Non-coupling design - Features an innovative non-coupling design that enables automatic rotation of the measurement direction for smooth operation. Versatile dovetail mounting - Mount the indicator from the top, rear, or front with a robust dovetail mounting system, providing flexible positioning and easy setup. Durable and precise - Built to last with a rugged aluminum housing and guaranteed accurate measurements every time. High sensitivity ensures reliable results. Use cases - Machining and quality control: measure inner diameters of hollow parts such as bushings, sleeves, bearing bores, or tight fits where access is limited. - Slender or concave profiles: accurately gauge outer diameters on curved or slender components where standard gauges struggle. - Flexible fixtures and fixtures: set up quickly in production lines thanks to top, rear, or front mounting options for compact or restricted spaces.