This tool should –always– be used to remove the rotating cups . Using the tool prevents damage to the cups, and to the spindle that the rotating cups are attached.
Removing the cups by hand tends to bend the stem and can cause problems in the rotation.
In the case of CIP 10M The plastic hub on the bottom of the metal cup. can be subject to undue wear and tear , if removed by simply pulling it off by hand.
One is included with all CIP 10 kits , unless mentioned in the description as being excluded.
This item is easily misplaced, thus the need to make it available for sale.