It is made of high-quality hardened stainless steel, rust-proof and free from dust and spray in any direction. Easy to use, smooth sliding and accurate results. The caliper micrometer is always used by professionals and hobbyists alike, by jewelers, hobbyists, woodworkers, DIY. Perfect and accurate caliper measuring tool for household/DIY measurement. Please choose stainless steel caliper for more accurate measuring. This digital can be used to Measure inside and outside diameter, depth and step with two sets of jaws and a probe.