I needed a hook to hang a milk/grocery bag on the front door of my house. I didn't want to drill a hole anywhere. The door has a keyhole with a slight protrusion. I figured I could hang the bag on the keyhole with a custom designed hook.

The printed model sits right on the protrusion & is help in place securely with a 4 mm bolt.

I have uploaded the FreeCAD model hoping it will be useful for someone who wants to change it. The freecad model isn't particularly well organized, but I figure sharing the source file will come useful for someone. The model was made in FreeCAD 0.18.

Small story behind this: we order milk packets to be delivered home when needed. Sometimes we found that the milk packet would be leaking - courtesy a cat. I am making this hook to hang the milk bag - hoping the cat won't see the delivered milk packet! Hope this works...

Prusa

i3 MK2 MMU

No

No

0.2

I used ColorFabb HT as I was too lazy to change filament.. PLA should be good to ensure adequate strength. However, I recommend PETG/anything else if this will be exposed to the sun.

I adapted https://www.thingiverse.com/thing:1081862 for this purpose. I liked the hook part, but I didn't need the screw holes. I imported the model into freecad, fused it with a thick ring that with a provision to bolt the ring securely onto the keyhole. The ring's inner diameter is 40.25 mm - slightly larger than the protrusion of the keyhole.