The distance that {HEAD ~ the lugs} 208 extend above {TAIL ~ the cutting edge} 232b can vary 
extend above
The distance that { HEAD ~ the lugs } 208 extend above { TAIL ~ the cutting edge } 232b can vary
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH