Extractors are a special style of double-sided drill bit. First, use the squared-off end to out the damaged area of the screw. Then, use ridged conical end to remove the screw.

Cut a Notch in the Screw Head. Use a dremel or hacksaw to cut a notch in the screw head and then use a slotted screwdriver to remove it.— Answered by Tester101. Try the Grabit Pro ...