Irwin Straight-Flute Extractor, 6-Piece Set, ST-1 to ST-6: * When working with softer fasteners and fittings, expansion-free extraction is always the safest choice * Straight flute accommodates both left- and right-threaded materials * Clearly stamped extractor and recommended drill bit sizes simplify tool selection * High-carbon steel extractor features a pipe- and fitting-specific design * Head Type: Straight-Flute * Material(s): High-Carbon Steel