Edsal / Muscle Rack Shelf Spool Hook

I use Edsal / Muscle Rack shelves to hold my printers, they are great for that, and I don't use the top/middle shelf so I am left with spare beams.
These spool hooks snap into the spare beam.

I wanted something quick to print that could be done in bulk fast, that was sturdy enough, could be snapped in and out, and was 100% printed.

Print 2, print the cross beam and you are done.