The magnet may include a north pole and {TAIL ~ a south pole}, {HEAD ~ the at least one recessed region} positioned between the north pole and the south pole 
The magnet may include a north pole and { TAIL ~ a south pole } , { HEAD ~ the at least one recessed region } positioned between the north pole and the south pole
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH