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