A portion of the surface 37b and the beveled surface at the converging end of {HEAD ~ the horse shoe}, which is {TAIL ~ the cutting edge} 37, has a layer of hardened material applied to improve the wear and self sharpening characteristics of the tooth 
is
A portion of the surface 37b and the beveled surface at the converging end of { HEAD ~ the horse shoe } , which is { TAIL ~ the cutting edge } 37 , has a layer of hardened material applied to improve the wear and self sharpening characteristics of the tooth
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL 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