【Firm and 】: Crafted from stainless steel, these inside outside calipers feature hardened and finely polished points to long-lasting durability. With a length of 350mm (14"), they are designed to provide reliable performance for precise measurements. 【 Design】: This set includes both inside and outside calipers, allowing you to measure a wide range of objects. The inside caliper is available in the same size range as the outside caliper, providing flexibility and convenience in various measuring tasks. 【Secure Friction Joint】: The firm joint design of these calipers utilizes friction to hold the legs securely in place, unwanted movement during measurements. This s accurate and consistent results every time. 【Dual Functionality】: With the outside caliper, you can measure thicknesses and outside diameters of objects, while the inside caliper allows you to measure hole diameters and distances between surfaces. This tool is for measuring both the external and internal size of an object, making it suitable for applications such as , pottery, and more. 【Various Sizes Available】: These outside inside calipers are offered in a range of sizes to cater to different measurement needs. Choose from metric sizes including 150mm(6"), 200mm(8"), 250mm(10"), 300mm(12"), 350mm(14"), and 400mm(16"). Each size is constructed with to deliver accurate results.