Tonight I bough a new 50 inch TV. My current wall mount screws were not big enough so I drove to walmart after getting home to get some bigger machine screws... go home, still werent big enough. Left again, came back and this time they seemed to be going in but really, really tight. I thought that was just how it was supposed to be but then it got to a point where I figured I needed smaller. (the 1/4 was too small but the 5/16 was too big... Whats in between?!) As I was taking the screw out it broke! I CANNOT get this thing out, as you can tell, I have already scratched the back up.. HOW CAN I GET THIS OUT 