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