The actuator knob may be configured for {HEAD ~ rotational movement} between {TAIL ~ a lock position} and an unlock position 
between
The actuator knob may be configured for { HEAD ~ rotational movement } between { TAIL ~ a lock position } and an unlock position
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH