{HEAD ~ The locking device} includes {TAIL ~ a retainer} which carries a radially movable locking members that are cammed outward by downward movement of the tieback member relative to the retainer 
{ HEAD ~ The locking device } includes { TAIL ~ a retainer } which carries a radially movable locking members that are cammed outward by downward movement of the tieback member relative to the retainer
HEAD 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