Spikes allow the guide bars to be connected to {HEAD ~ the trunk} of {TAIL ~ the tree} in horizontal, parallel positions on opposite sides thereof 
Spikes allow the guide bars to be connected to { HEAD ~ the trunk } of { TAIL ~ the tree } in horizontal , parallel positions on opposite sides thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH