Public domain
Andrews County, Texas. Bit at end of drill pipe. In going through hard structures these bits sometimes wear out in three or four hours
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineAndrews County, Texas. Bit at end of drill pipe. In going through hard structures these bits sometimes wear out in three or four hours. 1942-01-01. Vachon, John. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.