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