1. 【Plastic Selection】Our vernier calipers are made of high-strength plastic, which is light in weight and comfortable to use. The digital calipers are made of high-quality ABS plastic, with a long service life. The vernier calipers keep working all the time, so you don't have to worry about them stopping when the battery runs out like other calipers. 2. 【Practical Push-Pull】The buttons of the push-pull vernier calipers are well-made. They are easy to push and pull, not easy to slip or get stuck, and can measure accurately, which is convenient and fast. The professional vernier calipers are made of plastic and are suitable for measuring jewelry and jade to prevent scratches. 3. 【Clear Scale】The scale film of the double-sided plastic calipers is clearly engraved with words, and it can freely switch between the imperial and metric systems. You don't have to worry about different reading habits and inconvenience in use. The imperial and metric calipers are essential tools for accurate measurement in many scenarios. 4. 【Vernier Caliper Size】150mm / 6 inches. There are three colors to choose from: black, red, and white. 5. 【Wide Application Range】Our vernier calipers can measure the inner diameter, outer diameter, depth, and step length. The double-scale vernier calipers can be used continuously and are very suitable for families, carpenters, mechanics, jewelers, and even professionals. It is a good tool for measuring sizes.