U.S.S. screw stud or bolt size 1/2, 9/16. Drill size 5/16". Minimum depth of hole 1/2". High-quality, heat-treated tool steel. Drill size stamped on shank. Surface treated to resist rust. Straight flutes provide maximum bite. No binding or chewing of material.
Vermont American 21864 Straight Flute Screw Extractor No 4
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