Pretty self-explanatory, this is a shelf that works with my VersaTrack Bracket for 12mm or 1/2" plywood found here:
https://www.printables.com/model/373018-versatrack-bracket-for-12mm-or-12-plywood
Can use pretty much any ¼-20 bolt thats roughly ½" long but I used these:
https://www.mcmaster.com/screws/thread-size~1-4-20/length~1-2-1/316-stainless-steel-button-head-hex-drive-screws/
The author marked this model as their own original creation.