Very few things put a project on hold faster than a stripped screw. Impossible to remove using a normal screwdriver, these screws are also impossible to tighten. It may seem like a hopeless situation, but there is a tool that can save the day. If the stripped screw is suitable to the task, but cannot be tightened as needed, using a screw extractor in reverse will succeed in seating the screw flush.
Mark the exact center of the screw head, using the center punch and hammer.
Consult the screw extractor manufacturer's instructions. Drill a hole through the marked punch point at the depth recommended by the manufacturer, using the appropriate drill bit.
Slide the extractor into the end of the tap wrench. Place the tip of the extractor into the drilled hole.
Set the tap wrench to turn clockwise. Hit the wrench with the hammer until the screw seats flush with the material.