A screw extractor is a tool for removing broken or seized screws. ... One way to avoid this added difficulty is to drill a hole completely through the screw. Thus, if the fastener breaks, a punch can be used to drive out the easy out from the screw, via the back, or end, of the fastener.

Do screw extractors really work?

Rounded out and stripped screws can throw a real wrench in your productivity, but they don't have to bring your work to a grinding halt. Keep a relatively inexpensive screw extractor on-hand. It will let you quickly remove those pesky worn and weathered fasteners with a minimal amount of frustration.

What are screw extractors and how they are used?

A screw extractor is a high-strength steel shaft with a square head on one end and reverse tapered cutting screw threads on the other end. The square head fits into a T-handle that's used to turn the extractor. You can also grip and turn the head of the tool with locking pliers.