{HEAD ~ The angular position} of the chuck is adjusted and locked by {TAIL ~ the detent ring assembly} 
is adjusted by
{ HEAD ~ The angular position } of the chuck is adjusted and locked by { TAIL ~ the detent ring assembly }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL