The devices have a body with a button member extending into the body and having {TAIL ~ protrusions} locking therein using a form of {HEAD ~ bayonet lock} 
The devices have a body with a button member extending into the body and having { TAIL ~ protrusions } locking therein using a form of { HEAD ~ bayonet lock }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD