Locking fixture: Equipped with locking fixture to ensure stable measurement data and avoid data deviation caused by improper operation Benchmark rod: Equipped with a benchmark rod, it is convenient for accurate comparison and calibration, and improves the consistency and reliability of measurement Blue smooth coating frame: The blue smooth coating frame is not only beautiful, but also enhances the wear resistance and service life of the tool Carbide measuring surface: The measuring surface is equipped with a wear-resistant carbide head to improve measurement accuracy and durability Ratchet locking device: The ratchet locking device or friction sleeve locking device is used to ensure the accuracy of repeated readings and reduce errors, Manufacturer: ZXZZAS