This is an authentic style reproduction of this unique key for the Commodore CDTV unit.  It is used to remove the add-on modules that can be inserted from the back of the unit.  You need this key to remove those devices properly.

This item includes two reproduction keys as shown in the actual photos.  The original CDTV key shown in the photos is for illustrative/comparative purposes, and is not included.  Accessory module shown in the photos is also not included, and is shown to illustrate the key's use and identical function as with the original.