These recesses 14 intersect each other along {TAIL ~ edges} which extend perpendicularly towards {HEAD ~ the cutting edge} 
These recesses 14 intersect each other along { TAIL ~ edges } which extend perpendicularly towards { HEAD ~ the cutting edge }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD