Hook kit for roller blinds or blinds

I have several roller blinds installed in my house, and several of the handles have broken because the plastic isn't very good quality... So, I decided to take action and clone and make my own design. So far, they're working perfectly on my blinds, and not a single one has broken. 

I hope the design helps! I fully welcome any suggestions or ideas for improvements.

I include the clip and two handles (one thicker)

Thank you very much.