stainless steel, anti-rust and resistance, long for time service The sheet thickness gauge is useful for checking metal sheet wire size before welding or working, and is also and easy to read You can determine the thickness of the before welding or processing and measure the most popular welding thickness quickly and accurately Pulling this metal gauge tool out of your pocket to measure metal is quicker and easier than using a tape measure There are 2 styles, square/large square shaped with different scale, choosing based on your needs, Manufacturer: XIAOQENAN