A complete set. 1/4" through 1". Fine condition and ready to use. Coarse screws for faster cutting in green and softer woods. One bit is marked “IRWIN,” the rest are “MIDWAY.” Information from the Irwin website: In 1884, Charles IRWIN owned a pharmacy in Martinsville, Ohio. A local blacksmith who was a customer of Mr. IRWIN's came up with the idea for a solid center auger bit. He sold the rights to this invention to Mr. IRWIN and a year later, after patenting the Auger bit, Charles IRWIN, along with four other business partners formed the IRWIN Auger Bit Co.