{TAIL ~ An upper bladeguard} is immovably secured to the housing and has a rear wall defining {HEAD ~ an arcuate slot} 
{ TAIL ~ An upper bladeguard } is immovably secured to the housing and has a rear wall defining { HEAD ~ an arcuate slot }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD