The insert member fits within a sleeve member which is formed of a semiresilient material capable of maintaining {HEAD ~ its shape} at {TAIL ~ rest} but capable of being flexed when subjected to a force 
at
The insert member fits within a sleeve member which is formed of a semiresilient material capable of maintaining { HEAD ~ its shape } at { TAIL ~ rest } but capable of being flexed when subjected to a force
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH