{TAIL ~ Each spring lever} is selectably biased against a back side of {HEAD ~ the strike plate} in a first or second detent 
{ TAIL ~ Each spring lever } is selectably biased against a back side of { HEAD ~ the strike plate } in a first or second detent
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH