ClosetMaid Shelf hangers

I did this one specifically for my ClosetMaid shelves, such that the hook is solidly attached on the shelf, the only way it can go is up. The .stl was generated from the SCAD program available at https://www.thingiverse.com/thing:1367661 . If you haven't look at this design, it's well worth getting, I've made so many custom, useful hooks from it.

Design by Leif H. on MakerWorld (license: BY).