Manual precision measuring tools used for accurate dimensional measurement including outside micrometers, inside micrometers, depth micrometers, and three-point internal micrometers. These instruments accurately measure external diameter, internal diameter, thickness, and depth of machined parts in 0.01mm increments, serving as essential measuring equipment for quality control and process inspection. Available in various specifications including digital display type, analog scale type, and waterproof specifications to suit different applications, capable of high-precision measurement that is difficult to achieve with calipers. Measurement ranges span widely from 0-25mm to large sizes exceeding 1000mm, making them indispensable precision measuring tools for dimensional inspection, incoming inspection, and final inspection in manufacturing sites.