A tool called screw extractor was designed for people in exactly your situation.
Inserting it into the busted Phillips and applying unscrew action will back it out. Available from large hardware and automotive stores.
Take along one of the good screws for size comparison.
Inserting it into the busted Phillips and applying unscrew action will back it out. Available from large hardware and automotive stores.
Take along one of the good screws for size comparison.