Hi All, I'm working on a '70 Mustang Mach I. I need to adjust the striker pin in the door frame and am looking for the name or description of the tool needed. It is shaped like a Philips head but is larger than a #3. I suspect it is one of those Ponzi heads but would be perhaps a #4 or larger if that sizing is used on them. Am I correct in my identification and if so, what size and where to get?

Thanks, Art.