{HEAD ~ The position} of the tray is then secured with {TAIL ~ a fastener} screwably extending through the second arm into a friction fit relationship with the shelf 
{ HEAD ~ The position } of the tray is then secured with { TAIL ~ a fastener } screwably extending through the second arm into a friction fit relationship with the shelf
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH