{HEAD ~ a securing plate} having plurality of {TAIL ~ notches}, mounted to said second free end of said second arm 
{ HEAD ~ a securing plate } having plurality of { TAIL ~ notches } , mounted to said second free end of said second arm
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH