Using a drill press or a power drill with a pre-bored guide block, these hollow, saw tooth edged extractors bore a clean hole around the broken screw without damaging the surrounding surface. 1/4" extractor removes up to a #8 screw, 5/16" up to a #10 screw, and 3/8" up to a #12 screw. Overall length 2", both ends are equipped with saw tooth cutting edges.
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