I’m very careful about writing reviews for tools because every user is at a different level. However I am completely comfortable recommending this extraction set. I had an exhaust manifold to replace and I was able to remove all of the rusted out nuts by incrementally reducing the size. Once I got into something to actually bite into with one of the sockets- other than rust - the nuts spun off. - Awesome. See pictures of the various degrees of rusted fasteners including a bolt from a coil on the same vehicle. Functioned better than I expected.