Carbide measuring head: The measuring surface is equipped with a wear-resistant carbide head to improve the durability and long-term accuracy of the measurement Locking device: Equipped with a ratchet locking device or a friction sleeve locking device to ensure accuracy during the measurement process and prevent errors Locking fixture: Built-in locking fixture to further ensure the stability of the measurement data and avoid data deviation caused by improper operation Reference ruler: Equipped with a reference ruler, it is convenient for accurate comparison and calibration to improve the reliability of measurement Clear scale: The clear scale on the smooth bottom grid frame ensures that the data reading is more intuitive and accurate, and improves the convenience of operation