In {TAIL ~ the embodiment} shown, the form has an area of diminished width to aid cutting of the probe shaft at {HEAD ~ the outside perimeter} of the form  
In { TAIL ~ the embodiment } shown , the form has an area of diminished width to aid cutting of the probe shaft at { HEAD ~ the outside perimeter } of the form
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH