This is a heavy duty backpack hook. I wanted a serious one that I could put my backpack on with all my books in it. Its designed to screw right into a stud and I printed mine at 90% infill. holds my 50+ lb backpack without any issue. There is a mount with the standing buffalo logo and one without. The standing buffalo logo is for me but I thought the masses would be more receptive to a generic one. If you would like a specific logo just drop a comment.
Import in inches. I printed at complete fill because I wanted to hang a very heavy backpack. you do not necessarily have to do that.