This is to mount different sizes of sockets at a variable distance from another. All the other holders I found depended on the outside diameter being the same as my socket set, or the spacing wasn't changeable. 

Included are sliding mounts for ½" 3/8" and ¼" sockets. The holders get put onto the rail before mounting the rail to the gridfinity bin. It is also possible to remove the lips at the edge of the gridfinity bin and use the clamps, then they holders can be swapped out without taking off the rail.

I also included 2 ½" socket holders directly on the din rail to accommodate two longer sockets I have. 

If you make a change to have a special socket or something work please post it as a remix so we can all benefit.