wherein the neck portion is disposed between the first and second portions, the neck portion having a transverse width smaller than a transverse width of the second portion to permit {HEAD ~ insertion} and removal of {TAIL ~ the tool} 
of
wherein the neck portion is disposed between the first and second portions , the neck portion having a transverse width smaller than a transverse width of the second portion to permit { HEAD ~ insertion } and removal of { TAIL ~ the tool }
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 OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL