APPLICABLE TO: This product is a miniature plastic caliper, mainly used for precision measurement. Made of high quality plastic, lightweight, quiet, easy to use and comfortable. VERNIER DESIGN: Enables accurate inside, outside and depth measurements. Metal bars are embedded inside to ensure that it is not easy to break and durable. MEASUREMENT RANGE: Its measurement range is 0-150mm (0-6inch), which can be used for accurate measurement. It can display "inch" and "cm" at the same time, which is very convenient to use. EASY TO USE: An ultra-accurate and effortless stroke measuring tool. This plastic caliper is designed for ease of use and intuitive design. LIGHT AND QUIET: The micrometer measuring tool is made of high quality plastic, which is light, quiet, easy to use and comfortable.