Greycore Tools Installer Drill Bits are the ultimate tool to pull wire through the wall or floor when space is limited. Fish eye holes on both ends of the bit enable wire pulls from either direction. The screw point tip pulls the bit through the wood while the ultra-sharp two cutter auger head creates a smooth hole. Tapered head for easy bit retrieval Screw point tip to pull bit through wood Fish eye holes on both end of bit 3-Flat shank eliminates slipping in drill chuck Specifications Diameter: 9/16 Inch Length: 54 Inch Shank: 3- Flat Shank Diameter: 3/16 Inch Package Quantity: 1 Warranty: Greycore Tools is confident in the construction of all of our products. Our drill bits are designed, engineered and manufactured to highest possible standards; optimizing durability and service life. If you are unsatisfied with your purchase in any way please feel free to return the item to Greycore Tools for a full replacement. Warranty excludes dull and misused bits.