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