The file 'Hook With Keyhole Mount 3D Printer Model' is (scad,stl) file type, size is 79.1KB.
A hook that attaches to shelving units having keyhole slots (mine are Husky shelves from Home Depot). I uploaded 25mm and 36mm versions.
UPDATE: Uploaded OpenSCAD source so you can modify as needed.
keyhole_hanger.scad | 2.0KB | |
keyhole_hanger_25.stl | 457.6KB | |
keyhole_hanger_36.stl | 457.6KB |