problem removing crankshaft position sensor HELP PLEASE

[ladyindistress2]

So my husband has been trying all day to get the old crankshaft sensor out but the screws will NOT move. They are now stripped and so he got a tool that is supposed to fit over stipped screws and that didn't work either. He's tried wd40 and a drill (supposedly you usually don't need one). We are at our wits end. We have a mechanic coming tomorrow but really don't want to shell out the $95 he is going to charge only to be told he can't get it either. Anyone know how to pry that thing out?