each of said sockets further comprises an inner cylindrical member having {HEAD ~ a plurality} of {TAIL ~ housing sections} with substantially parallel axes for housing said rear cylindrical member, and a coupling portion for coupling said housing sections; and 
of
each of said sockets further comprises an inner cylindrical member having { HEAD ~ a plurality } of { TAIL ~ housing sections } with substantially parallel axes for housing said rear cylindrical member , and a coupling portion for coupling said housing sections ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH