The holder has a cutout for receiving an arm that is not being used, and which avoids contact with the outer border and {HEAD ~ each side} of {TAIL ~ that arm} 
of
The holder has a cutout for receiving an arm that is not being used , and which avoids contact with the outer border and { HEAD ~ each side } of { TAIL ~ that arm }
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 REL TAIL TAIL TAIL TAIL TAIL TAIL