* The needles are smooth, suitable for heavy or thin line. * Complete specification, 8 different sizes of needles to satisfy all your needs. * This ergonomic soft crochet hook makes you crochet for hours without fatigue, feeling pain or cramping on hands or thumbs. * Entirely new materials with high density, it can be used for a long time. * Every hook is printed with both letters and numbers, so you’ll never be confused which hook works best for which loop.