{HEAD ~ The tooth} is bent at approximately 45 degrees in {TAIL ~ the direction} of the beveled surface 
is bent in
{ HEAD ~ The tooth } is bent at approximately 45 degrees in { TAIL ~ the direction } of the beveled surface
HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH