In the second position, the abrasive surface is in {HEAD ~ contact} with {TAIL ~ the exterior surface} of the elongated work piece 
with
In the second position , the abrasive surface is in { HEAD ~ contact } with { TAIL ~ the exterior surface } of the elongated work piece
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH