{HEAD ~ A plate} has an opening formed between two legs for receiving the block and has {TAIL ~ two pins} engaged into the extensions for rotating the plate relative to the base between a vertical position and a folded position 
{ HEAD ~ A plate } has an opening formed between two legs for receiving the block and has { TAIL ~ two pins } engaged into the extensions for rotating the plate relative to the base between a vertical position and a folded position
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL 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