This socket wrench I ordered to tighten the faucet at the sink. It is for all standard sizes of matching nut wrench while. The socket is also long enough to get hold under the sink to the nuts. While it's not nice, this is the knob to tuck and not being fixed on keys. If you are not careful, the knob falls down. But this is not to be considered at the price as a deficiency, but make sure only an indication when nuts tighten. Otherwise, for the price a buy rating