Drill holes up to four inches deep into lumber with this Speedbor spade bit. It measures 6 in L x 1/2 in dia, with a 1 3/4-in flute length. This wood spade bit has three cutting spurs that make clean holes at a fast rate and with less breakout. The screw tip simplifies drilling for easy job completion. Switch bits seamlessly with the 1/4 in quick-change grooved hex shank.