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