The locking mechanism may be responsive to movement of the actuator knob to maintain {TAIL ~ the tool} within the output shaft when the actuator knob is in the lock position and permit removal of the tool when {HEAD ~ the actuator knob} is in the unlock position 
The locking mechanism may be responsive to movement of the actuator knob to maintain { TAIL ~ the tool } within the output shaft when the actuator knob is in the lock position and permit removal of the tool when { HEAD ~ the actuator knob } is in the unlock position
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH