1-1/4" x 17" Wood Drilling Power Ship Auger Bit The DeWalt 1-1/4" x 17" wood drilling power ship auger bit is an extremely durable and useful attachment. Use this to increase your drilling efficiency and decrease your work time. Superior build quality means you will be using this bit for years with minimal wear and tear. A must have for any professional or do-it-yourselfer. Features: Self feed spur for fast material penetration Dual cutting edge for maximum durability in nails Hardened alloy steel provides superior bit life 7/16" Ball groove shank allows for quick bit changes DEWALT is firmly committed to being the best in the business, and this commitment to being number one extends to everything they do, from product design and engineering to manufacturing and service.