A complete set., No. 4 through 16, corresponding to ¼ inch through one inch. Fine condition and ready to use. Coarse screws for faster cutting in green and softer woods. 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 the 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.
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A complete set., No. 4 through 16, corresponding to ¼ inch through one inch. Fine condition and ready to use. Coarse screws for faster cutting in green and softer woods. 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 the 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.