Each arm has an outer border 70 and a pair of {HEAD ~ opposite sides} 72, 74 that extend largely radially from {TAIL ~ 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 
extend largely radially from
Each arm has an outer border 70 and a pair of { HEAD ~ opposite sides } 72 , 74 that extend largely radially from { TAIL ~ 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
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL REL 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