When the holder is in a cutting position, {HEAD ~ a cutter} is moved to cut {TAIL ~ one or more notches} in the key blank 
is moved to cut
When the holder is in a cutting position , { HEAD ~ a cutter } is moved to cut { TAIL ~ one or more notches } in the key blank
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH