Smart Rope Spool

This is a handy Rope Spool. Use your imagination where to use it. :)
It has magnet stopping system, that don't let spool to rotate by-self.
You will need:
8 disk magnets (10 X 2 mm).
2 bearings 608-2RS (8 X 22 X 7 mm).
1 M8 Bolt 160mm long,
1 M8 Nut with plactic lock.
1 M3 bolt 15-20mm long or 3mm diameter rod 15mm long.