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