Drill Doctor DA02105PF Left Handed Reverse Twist 3/32-Inch to 1/2-Inch Chuck for the Drill Doctor Models DD500X and DD750X only
Holds 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 Models DD500X and DD750X only.