A pivotal shaft is inserted into shaft penetrating apertures formed in {TAIL ~ the hinge ledges} so that {HEAD ~ the hair retainers} are pivoted about the pivotal shaft 
A pivotal shaft is inserted into shaft penetrating apertures formed in { TAIL ~ the hinge ledges } so that { HEAD ~ the hair retainers } are pivoted about the pivotal shaft
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH