The bolt includes a housing and {TAIL ~ a spring biased handle} formed with {HEAD ~ a pivotal stump} 
The bolt includes a housing and { TAIL ~ a spring biased handle } formed with { HEAD ~ a pivotal stump }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD