Shelf Hook (No Supports Needed)

I saw the others' similar ideas but didnt like that you need support for the dowels to print them or other minor details, like fillets that will either cause print issues or need supports. Or they have no chamfers making the part rough and more likely to warp if printed in ABS or ASA.
 

Therefore this one has chamfers instead of fillets and the dowels are oversized with edges sliced off so they will print without SUPPORTS.

This shelf hook fits 
11mm holes (dowel 10.3mm)
6mm slot (dowel 4.5mm)
33mm between centers of holes

Changing the Chamfer size for the dowels adjusts the thickness of the slot and the depth of the dowel neck
 

https://cad.onshape.com/documents/ded26aa8fb3a082b177f7939/w/8b001f7c4bc9c8a8fc4d2567/e/27e83024b1dcacb390a9d1ff?renderMode=0&uiState=6a50d2459b784a5be4486ab0

Feel free to remix, improve, commercialize...

Leave me a LIKE please ;-)