Over-the-Door Organizer Hooks

This is to replace the hook-things that go on the top of your door for products like this:

http://www.amazon.com/Pro-Mart-42-Pocket-Over-Door-Organizer/dp/B002V9195S/ref=pd_sim_201_1?ie=UTF8&refRID=050ZKDZ0Q0K7119K2860

A lot of companies sell them. When we moved we lost the hooks so I designed my own and they work great and are very strong even with just PLA.