Thanks proptech I shall keep them in a safe place and note down what safe place so I don't go searching in the garage muttering 'where the hell did I put those &*$)**? extractors. My apologies for being late in thanking you. Greengrass
I have only ever once had a success with these. What happens is, it's far too easy to snap the extractor off leaving a hardened piece of steel that can't be drilled, stuck in the stud and it eventually takes far longer to sort that out than if you drilled the stud and re-tapped the hole in the first place!
They are not that strong, and unfortunately, there is no warning that it's about to fail. Just "snap" and then %&?@.