I've seen Craftsman Bolt-Out mentioned in several questions/threads about removing stuck or rounded-off bolts, a problem I've run into many times. There's no particular problem I'm looking to solve right now, but it's something I might like to buy and have on hand for the next time I hit such a problem. But first I'd like to know if anybody has experience with this tool, particularly:

  • Does it work often?
  • How does it work?
  • How do you identify which stuck-bolt situations it's likely to work for?
  • Tools like this can really help in the right circumstances but they aren't magic spells: mechanics.stackexchange.com/q/3742/57
    – Bob Cross
    Commented Apr 11, 2013 at 15:57
  • 1
    Also keep in mind that the material they're made of is most likely harder than anything else you have in your garage and that includes your drills... Commented Apr 12, 2013 at 0:09

1 Answer 1


These work when the head of the bolt has the corners rounded-off, usually from a wrench slipping. If the head is broken off and completely gone, they are not an option.

Generally they work best if you pound the bolt-out tool onto the damaged head with a hammer. So obviously it's best when there is room to swing a hammer at the bolt head. Easier with bolts that have a lower grade and softer metal.

Another option - if you have a welder - is to weld another piece of metal on the damaged bolt head and use that to turn the bolt out.

  • The welding part also puts a fair amount of focused heat onto the bolt, helping break it free. But even a cheap welder costs a lot more than a set of bolt extractors and a Mapp gas torch. :D
    – dannysauer
    Commented Aug 30, 2016 at 20:53

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