Just a remix.

The original had too small of a hook for my backpack to hang so I sketched a new one based off the orig idea. Made it a longer hook and a bit wider. It also takes a #8 wood screw as well now

Lay it on the side for printing. I did it in PLA. My walls are 3 layers thick so in my case infill doesn't matter...if you have less walls maybe 80% infill would suffice