"Bought this kit specifically for one job but needed a set "just in case" for a long time. In this instance the smallest of the set was used and removed the offending broken LPG injector from my truck without any problems at all. The only drawback is the size of the shank to get to grips with if you don't already have a tap and die set where you can use the tap t-bar to grip the shank. The larger you go the easier it is to find an appropriate spanner to get better leverage. All in all a good set that I am sure I will make further use of."
"unfortunately (for me) I had thought these were smaller stud extractors however they are actually rather large and probably more suited to removing wheel bolts than smaller studs. Yes on looking back they are sized in mm but for whatever reason I had thought they were the more common (to me) size numbered extractors. Looked ok but I had to return as much to large, a lot of metal for the money."