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