Removing screws that have a stripped head can be frustrating. There are lots of reasons a screw head can strip, but one of the easiest ways to remove a screw that has a stripped head is to use a screw extractor bit. An extractor bit features two ends. One end looks a little like a short twist drill bit, and it is called the burnisher. The burnisher cuts away some of the stripped original driver profile, leaving a clean surface. The other end is the extractor, which features sharpened threads that are cut in the opposite direction of ordinary screw threads. The extractor end bites into the screw head and turns it when the drill is run in the reverse direction.
Read more