In addition, the invention provides {HEAD ~ a rotatable insert} which includes {TAIL ~ a base assembly} configured to receive an actuator, advantageously the base assembly and actuator of the present invention 
includes
In addition , the invention provides { HEAD ~ a rotatable insert } which includes { TAIL ~ a base assembly } configured to receive an actuator , advantageously the base assembly and actuator of the present invention
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH