The CRAFTSMAN CMMT14108 Spiral Screw Extractor is a compact, lifetime‑warranty toolset designed to remove stubborn broken screws, studs, bolts, or fittings in both SAE and metric sizes. Its five tapered spiral extractors range from 1/8″ to 3/4″, and the left-hand spiral design grips deeply without expanding the surrounding material—ideal for delicate or thin-walled components .