{HEAD ~ A knob} 52 is integrally attached to the fastener 48 at the end thereof opposite {TAIL ~ the washer} 50 for allowing a user to regulate the fastener displacement between the second arm 44 and the shelf 62 
{ HEAD ~ A knob } 52 is integrally attached to the fastener 48 at the end thereof opposite { TAIL ~ the washer } 50 for allowing a user to regulate the fastener displacement between the second arm 44 and the shelf 62
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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