{HEAD ~ Each arm} has an outer border 70 and {TAIL ~ a pair} of opposite sides 72, 74 that extend largely radially from the axis 24 of the polygon, and each arm forms a cutting edge at the intersection of the outer border and each side of the arm 
has
{ HEAD ~ Each arm } has an outer border 70 and { TAIL ~ a pair } of opposite sides 72 , 74 that extend largely radially from the axis 24 of the polygon , and each arm forms a cutting edge at the intersection of the outer border and each side of the arm
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH