Needed a way to store my thin wires that I order in different sizes and colors. The wire just gets wound around those, then into the slot and through the hole. That way it can easily be unwrapped and is safe to not come off the "spool".

There are two versions: one that has a 2 and the second number (0,2,6,8) for AWG20,22,26 and 28, and the alternative version that's only got 0,2,6,8.

Those size wires are the only ones that make sense to me, as bigger one don't wrap around nicely anymore.

You can fit anything between 5-15m around one, depending on the wire size.

In the background of the pictures you can see the old version w/o numbers,