This is a vintage 6" pipe wrench made by RIDGID, a well-known brand in the tool industry. The wrench is made of hardened steel and has a 6" jaw size. It is a rare find and was manufactured in the United States by the RIDGE TOOL CO. The handle size is also 6" and the system of measurement is standard (SAE). This wrench is a great addition to any tool collection and can be used for various plumbing and mechanical tasks.