The blade 204 may have {HEAD ~ an exterior surface} 204B and {TAIL ~ a blade edge} 204C 
The blade 204 may have { HEAD ~ an exterior surface } 204B and { TAIL ~ a blade edge } 204C
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH