{HEAD ~ An improved duress feature} preferably uses {TAIL ~ a modified tumbler wheel assembly} and a duress switch to trigger the alarm 
{ HEAD ~ An improved duress feature } preferably uses { TAIL ~ a modified tumbler wheel assembly } and a duress switch to trigger the alarm
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH