{HEAD ~ The lateral tabs} prevent the index dividers from sliding forward and allow the index dividers to ride up or down in the vertival slots as the stack of {TAIL ~ sandpaper sheets} changes 
{ HEAD ~ The lateral tabs } prevent the index dividers from sliding forward and allow the index dividers to ride up or down in the vertival slots as the stack of { TAIL ~ sandpaper sheets } changes
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH