{HEAD ~ A key holder} comprising {TAIL ~ a plate} provided with an elastic ring and a detent pawl is insertable into a flat sleeve 
comprising
{ HEAD ~ A key holder } comprising { TAIL ~ a plate } provided with an elastic ring and a detent pawl is insertable into a flat sleeve
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH