Eagle Tool Flexible combination screw point installer bit. The ultra sharp threads provide better pulling power and faster drilling speeds. It moves quickly through obstructions. This bit is recommended for use when drilling through walls. Aggressive and self feeding screw point. Three flat non-slip grip on the chuck end. Flexible spring steel shank. Wire fishing accommodation holes in the head and shank. 9/16-inch head diameter, 3/16 inch shank diameter, and overall length is 54-inch.