This socket is for perfectly retightening the hidden pedal nut after cleaning and relubing the bearings. Must be used with a socket in the middle. The socket gives it strength. Don't crank on it too hard, only enough to lock the nuts.
Tip: It's easier to lock the nuts slightly looser than you want. Then you can continue tightening the outside nut without relying on the plastic.
This has been tested and it does work very well. But you should expect only several uses out of it.
The author marked this model as their own original creation.