Sutton Screw Extractor (Easy-Out), Number 3, Single. These Screw Extractors are designed to remove broken studs, bolts, socket screws and fittings. Made from Carbon steel these extractors feature a spiral flute which is designed to embed itself deeper, therefore as fastener resistance increases the extractor's grip increases. Helpful Hint: Use recommended Sutton Tools Drill size 4.0 to pre-drill a pilot hole in the broken bolt prior to extracting. Screw/ Bolt size range; Metric- M8 to M10, Imperial- 5/16 to 3/8.