A complete graduated set of 13 bits with faster-cutting coarse lead screws. All marked RUSSELL JENNINGS. All are bright, clean and sharp. Sizes 4 through 16 which correspond to 1/4 inch to 1 inch. The bits were patented in 1855. The three-tiered box was patented in 1890. They were bought out by STANLEY in 1944. The best user auger bits ever made!