If you're afraid you may strip them, get an "impact driver." It has a 3/8" square drive (like a ratchet wrench) attached to a cylinder. You get a phillips bit, insert the tool into the screw, and while holding it twisted (the whole cylinder twists while leaving the bit stationery), smack the back of it with a 5 lb. hammer. The tools converts the torque of a hammer hitting it into a twisting motion all while pressing into the screw (remember you hit it with a hammer). You want the wheel, or whatever is holding the screw, to be on something solid.
Best Regards,
David
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2000 Honda Accord V6 137k miles
1972 300SEL 4.5 98k miles
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