Double wing spurs reduce vibration while creating easy hole formation. Patented cutting edge for easier and faster woodboring over conventional models. Cutting edge removes chips fast. 1/4" quick change hex shank for use in all universal Quik-Lok extensions. Includes: 6" universal Quik-Lok bit extension, 3/8", 1/2", 5/8", 3/4", 7/8", and 1-1/8" spade bits.