Hi maker,
This tool is designed for the KYZ FF2 High Flow Desiccant Holder (https://makerworld.com/en/models/179426#profileId-197392)
It's a very good design, unfortunately it is very tight with the Rosa3D spool (refill) By putting the lid on first I manage to place the jar, but unscrewing it is almost impossible because of the friction, I had to quickly make a tool to unscrew it.
So this is it, a little help when the friction between the spool and the Desiccant Holder is too strong.