And really.. who doesn't want an excuse to go to WoodCraft 🙂
woodcraftThe screw extractor is the easy way to remove sheared or broken screws. When used with a drill press or a power drill with a pre-bored guide block, this hollow, sawtooth edged extractor bores a clean hole around the broken screw without damaging the surrounding surface. The 5/16"" extractor removes up to a #10 screw.
https://www.woodcraft.com/products/screw-extractor-5-16