it's really counter-intuitive, and the "manual" doesn't mention it at all.<BR><BR>Is this common? I've never run into a reverse-thread screw before.

Once the stripped screw is prepped, though, the extractor uses a tapered drill bit with a reverse thread to help pull ... If you need a screw extractor set that is small but durable, Amazon ...

The patented reverse thread design also allows more space ... “Titen Turbo was designed with installers in mind, helping them set the screw with less torque, less binding, and less stripping.” ...