wherein {HEAD ~ 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 insertion and removal of {TAIL ~ the tool} 
wherein { HEAD ~ 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 insertion and removal of { TAIL ~ the tool }
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL