Works perfectly for those nuts or bolts that have become rounded and are having difficulty finding the right socket to get a good grip. This is a tool that should be in every person's tool box or garage!
this tool is good for nuts and bolts that are not very tight, other than that, not a good investment.
I bought this to removed a damage oil drain plug, didn't work, oil bolt was badly damage, but this seem to make it worst, just shave the bolt making it more bald. i file some edges to the bald bolt to see if this would get a grip on it and take it off but no didn't work, eventually found out they have special damage bolt remover sockets. those did that job. and just google that and you will find some too, damage bolt remover sockets.
Okay, not a gimmick in the normal sense.
This product can replace a multitude of sockets.
It is not a one trick pony, like a specialty tool
This is a great addition to any socket set. Good quality, remove a very badly damage bolt. Glad I found it on the Sears site.