This is a "companion piece" for my switch plate key holder, but can be used with other key hangers as well :

 https://www.printables.com/model/1517068-key-holderhangerhook-switch-plate-multiple-version

Assembly and Use

 Note that the tag has a "flat side hole" and a "raised loop hole."  Insert the key ring into the raised loop hole (use an added split-ring key ring if necessary).

Print the tags in a different color for each key ring you want to hang (see photo).

Print Instructions

Print in PLA/PETG/FLEX using the 3mf files provided, otherwise :

• 0.2mm layer height

• 3 perimeters

• 25% grid infill

CAD

The OnShape 3D CAD files for this are here :

 https://cad.onshape.com/documents/8b342154937c94000443b890/w/ebc8c55d01690995e2b5a0f7/e/8777066a38c7d5730789ea8a?renderMode=0&uiState=6942936a8ce727bf61a3f2ed