Featuring A Heavy-Duty, Full-Length, Heat-Treated Shank For Protection Against Bends And Breaks, Dewalt Spade Bits Are Equipped With High-Performance Cutting Spurs For Optimum Hole Finish. An Extreme Speed Channel Provides Fast Chip Removal, And A ¼” Ball Groove Shank Offer Quick-Change Applications. A ¼” Hex Shank Helps To Prevent Slippage, And A Hang Hole Enables Easy Storage And Wire Pulling.