The angle between the bottom surface 35 of the insert 21 and the sidewalls 59 of the insert is typically equal to or greater than {HEAD ~ the angle} between the bottom surface 55 of the recess 53 and {TAIL ~ the sidewalls} 57 of the recess 
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The angle between the bottom surface 35 of the insert 21 and the sidewalls 59 of the insert is typically equal to or greater than { HEAD ~ the angle } between the bottom surface 55 of the recess 53 and { TAIL ~ the sidewalls } 57 of the recess
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH