Sharpen left handed drill bits on your Drill Doctor. This Drill Doctor chuck olds left-handed (reverse twist) 3/32” to 1/2” drill bits. Left-handed drill bits are used to remove broken bolts without creating an oversized hole, which would result in having to use a larger bolt to replace the one removed. A left-handed drill bit actually backs out the original broken bolt without damaging the existing threads. Fits Drill Doctor DD500 Tradesman or Drill Doctor DD750 Professional only.

Not for XP or X Model!