Once the stripped screw is prepped, though, the extractor uses a tapered drill bit with a reverse thread to help pull the screw out. Just make sure you're holding the drill straight over the screw.

The reserve thread chaser is wrapped around bolts or studs and repairs the threads after being screwed into a fastener. The product line ranges from ½ inch to 4½ inches and is held together by a ...

There’s even a specialized version that features a reversed (left-hand) thread on the machine-screw side, used for suspending construction wiring or metal assemblies from wood. These reverse-thread ...