IRWIN 133 years of ingenuity and excellence , Solid centre , Single spur tip , Self-feeding screw point , Hex shank , Fully hardened body Complete Set of 13 IRWIN Auger Bits in Original Box - 105913 – Jim Bode... The single spur cutting edge scribes the circumference of the hole for a smoother quality finish. Puuporanterä Irwin Auger 15x114/191 mm Self Feeding Screw Point Drill Bit IRWIN IRW10502757 Wood Auger Drill Bit 16 X 191mm For Sale Online Irwin 10502756 15 X 191mm Auger Drill Bit For Wood As well as the Record brand of hand tools, consisting of metalworking and woodworking vices, bolt-cutters, G-clamps, pipe tools and woodworking planes, the company has many other famous brands, including: Marples, Jack, Vise-Grip, Quick-Grip, Gilbow, Joran, Hilmor, Hanson, Strait-Line and Lenox. IRWIN, 11/16 in Drill Bit Size, Auger Drill Bit The Irwin IRW10502756 Auger drill bit has the following dimensions: Drillbit diameter: 15., 0mm Total length: 191mm Working Length: 126mm IRWIN Industrial Tools Ltd. The solid centre provides extra rigidity whilst boring, the self-feeding screw point provides faster boring in both soft and hard woods and the fully hardened body from tip to shank provides extra durability.