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A hook threader uses a hook retainer to temporarily fix an eye (27) of a hook in registry with a line-feeding groove (18). The retainer may be a notch (20) formed at a terminus of the line feeding groove. In preferred embodiments, a rare earth magnet (21) is located below the notch. In some embodiments, the bottom edge or root of a "V" shaped line feeding groove is arcuate (26a).