The device 6, wherein the vertical projection comprises a stem and {HEAD ~ a top portion}, and wherein {TAIL ~ the stem} is slimmer than the top portion 
The device 6 , wherein the vertical projection comprises a stem and { HEAD ~ a top portion } , and wherein { TAIL ~ the stem } is slimmer than the top portion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH