Features:<br> Accurate Calibration: This external micrometer calibration rod is an essential tool to ensure the accuracy of your caliper measurements.<br> Durable Material: Produced of quality metal, this calibration rod is sturdy- and long-lasting, providing reliable support for your measuring need<br> For Professionals and DIYers: Whether you're a professional machinist or a DIY enthusiasts, this calibration rod is perfect for anyone who need precise measurements for their projects.<br> All-rounded Usage: Use this calibration rod with calipers to measure a wide ranges of objects, from small parts to larger component.<br> Simple to Use: Simply attach this calibration rod to your caliper and adjust until the readingmatch the marks on the rod. It is simple to use and saves you and frustration.<br> <br> Specifications:<br> Material: metal<br> Standard: 50mm/25mm/75mm/100mm/125mm/150mm/175mm/200mm/225mm/250mm/275mm(optional)<br> Note: The micrometer 0-25mm does not require a measuring rod. The micrometer 25-50mm uses a 25mm measuring rod, 50-75mm uses a 50mm measuring rod, and 75-100mm uses a 75mm measuring rod.<br> <br> Note:<br> Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid,<br> Due to the difference between different monitors, the picture may not reflect the actual color of the item.<br> <br> Package includes:<br> 1xCalibration Rod