The second member is adapted to be attached to a boat canopy and has {HEAD ~ at least one locking flange} for insertion into the channel of {TAIL ~ the first member} 
The second member is adapted to be attached to a boat canopy and has { HEAD ~ at least one locking flange } for insertion into the channel of { TAIL ~ the first member }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL