Overview Reviews Product Description Irwin Hanson® screw extractor, spiral flute, measurement system: imperial, 1/4 in drill, #4 extractor, for screw size: 9/32 to 3/8 in, 1/8 in npt, 1/8 in bsp, 8 to 10 mm, metal. Irwin Tools Catalog Product Videos Custom Field Manufacturing country US Product Reviews Write a Review Write a Review × Irwin 5 Pc. Hanson® EX-4 Spiral Flute Extractor 52404 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *