Remove a Bolt With a Snapped Off Head

A drill out set should only be used when the head of the bolt has been snapped off and the rest of bolt is recessed in a hole. Be sure to run the drill in reverse when drilling the hole as the bits in drill out sets are meant to run in reverse. Also, make sure to run the drill out very slowly as they are prone to breaking. Make sure to drill the hole in the direct center of the bolt. A center punch can help to make sure you have the exact center of the bolt.

Drill the bolt out with the proper size drill bit that will fit the Heli-Coil that you need to put in.