Worked well at removing broken stud, but difficult to put on in a tight spot.
While removing my spark plugs I managed to round off the hex nut on one of the plugs making it imposible to remove the plug from the head. To make things more difficult the plug sat deep in the head, significantly restricting access by anything other than a deep socket on an extention. This extractor set was perfect for the job, unlike most other extractors, these allow the use of a 3/8 socket wrench and extention bar to permit a deep reach. I had the plug out in no time and saved me the cost of an otherwise expensive repair.
Works Well, Must have in every tool box. No Cons Does What you Need it to