Parametic hook for shelves

I made this hook to put on my shelves so i can keep my jacket, keys, purse and everything else that can be hanged. Its really convenient if you have some shelves near your door. Its parametric model, you can change the size of the middle section to match your shelves. The current model has middle = 19.5mm (this was the thickness of my shelves)you can ignore middleWidth for this model (it is used to make the middle wall thicker or thinner). No Hardware Required! just put it on the shelf and take it off when you want.If you want have thicker or thinner shelves you can can edit the model on Makerworld (using a computer) and change the middle value to value of your shelves thickness.