{HEAD ~ said fourth plane} of {TAIL ~ said edges} of said open top side of said clasp lower part being parallel to said first plane of said upper surface of said clasp upper part  
of
{ HEAD ~ said fourth plane } of { TAIL ~ said edges } of said open top side of said clasp lower part being parallel to said first plane of said upper surface of said clasp upper part
HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH