Daredevil™ spade bits are designed for speed, ease of use and hole quality. Aggressive cutting edges and full cone threaded tip provides the speed needed to drill faster and it pulls the bit through the material with less effort and vibration than other spade bits. Cutting spurs on the edge of the bit score the outer edge of the hole before the cutting edge removes the material. Contoured paddle for fast chip removal. All 6" spade bits have 1/4" hex shank.