1/2 inch square drive coupler

This is a female-female coupler for 1/2 inch square drives. It has grooves for the spring loaded ball to help keep it in place.

I made this so I can store things with a male end such as a hex shank socket adapter on my socket rails next to my sockets.

The model can be scaled down to other drive sizes as needed. If requested, I can upload the other common sizes.