Home Products Threading Tools Screw Extractors Screw Extractor Square Flute #1 Bulk Screw Extractor Square Flute #1 Bulk (73101) Easily removes 3/16-Inch to 5/16-Inch broken bolts and screws Use 9-64-Inch left handed drill bit to drill hole this will help loosed bit Ideal for thin wall extractions Find a Retailer