Check the listing for details. Firm Joint Inside Caliper 200mm 8 Inch Tool Steel Measurement Tool. Condition: New. Listed at 14.48 USD. 1. Constructed from tool steel with heat treatment and a chrome finish, this caliper offers durability, resistance to corrosion, and a smooth, reflective surface.2. The firm friction joint ensures stable and accurate measurements, with a burr-free and smooth surface that is easy to read and use for extended periods without loosening.3. Inside calipers are designed to measure the inner diameter or groove width of cylindrical holes. They are suitable for use in tasks such as carving, shaping, and modeling, making them good for craftsmen and professionals who require precise internal measurements.4. Notice: Ensure the caliper is clean and dry before and after use to maintain its accuracy and longevity. Avoid excessive force when adjusting the caliper to prevent damage to the tool or the workpiece.