1101:Many tool sets have some totally useless tools . Weird size sockets & spanners, screwdrivers that have little use.
A great example of this, since you mention Allen keys, is Allen key sets that go down to mm or sub-mm sizes so they can artificially inflate the count on an X-key set. I tossed all the mm-or-less ones and then worked my way up the remaining ones putting a bit of tension on them until I got to ones that didn't snap any more, for anything below a certain size you need a hex-head screwdriver, not an Allen key.