The screw gun is then pressed downwardly, to drive a screw into the center of {HEAD ~ the plate} to secure {TAIL ~ the plate} at the desired location 
to secure
The screw gun is then pressed downwardly , to drive a screw into the center of { HEAD ~ the plate } to secure { TAIL ~ the plate } at the desired location
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH