Made of metal, this calibration rod is sturdy and durable, providing support for your measurement needs VERSATILE USE Use this calibration rod with calipers to measure a wide range of objects, from small parts to larger components. SIMPLE TO USE - Simply attach this calibration rod to your caliper and adjust until the reading matches the marks on the stem. It is simple to use and saves you frustration. ACCURATE Calibration - This external micrometric calibration rod is an essential tool for the accuracy of your calipers measurements. FOR PROFESSIONALS AND DIYERS: Whether you are a professional machinist or an amateur, this calibration rod is for anyone who needs accurate measurements for their projects., Manufacturer: DINSOAVR