{HEAD ~ The head} is shaped to define a channel for receiving {TAIL ~ an exposed margin} or flange of a hinge mount to rigidly engage the hinge 
{ HEAD ~ The head } is shaped to define a channel for receiving { TAIL ~ an exposed margin } or flange of a hinge mount to rigidly engage the hinge
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH