Faucet Adapter Mounting Key for WatWin Select

I designed a "Faucet Adapter Mounting Key for WatWin Select" after struggling to remove the included adapter from this Clas Ohlson faucet aerator. Mounting the grey plastic adapter (highlighted in one of the pictures) was easy, but when I needed to remove it, it was stuck. To solve this, I measured the adapter’s interior and designed this tool in FreeCAD, refining the dimensions through trial and error.The tool fits into the adapter, aligns with the notches, and allows for easy unscrewing. Hopefully, this helps others who run into the same issue!