Spool holder

I use empty spools for power extension cords. So I designed a holder for it.
3 sizes for different spool width :
- 55 mm fit for ArianePlast 750g spool, Francofil 500g spool
- 65 mm fit for Eryone 1kg spool
- 75 mm fit for ArianePlast 1kg spool

2 versions for the nut :
- V1 : you have to unscrew to put or remove the spool
- V2 : you dont' have to unscrew to put or remove the spool

I have used a M5 screw to fixed it to the wall. But you can use other screws up to M6.5