Understand the 2 phillips head screws are holding the front rotor on. Having a lot of difficulty removing.. Have used a penatrant oil,, these things are still too hard to remove,, What tools are best to get these things off. I'm fearful of rounding out these screw heads also. What do I need to use??

update - phillip heads have rounded off. now what?


Thanks.

 

Impact Driver with a really large phillips bit.