Metal material: The hole and cone gauge is made of high-quality Metal material and has a long service life. Precise construction for quick and easy measurement. Precise design: The caliper is fully tapered along the length for fast and reliable measurement in professional environments. measurement: The hole taper ruler can easily measure the hole with an accuracy of 0.1mm, which is ideal for fine work in a variety of applications. The structure is simple and the design is reasonable. A wide range of applications: the hole taper is suitable for measuring thin-walled parts, plastic pipes, inner diameters and holes.A wide range of applications: the hole taper is suitable for measuring thin-walled parts, plastic pipes, inner diameters and holes., Manufacturer: Akfldms