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