Made of strong birch wood, Lykke Driftwood needles are very smooth and light. With their warm character, Driftwood needles are easy on the hands and the eyes. They are a true pleasure to work with! The 10 inch set of straight needles from Lykke includes 12 pairs of needles, US sizes 4,5,6,7,8,9,10,10.5, 11, 13, 15, and 17. They come in a gray faux denim case. All LYKKE products are guaranteed for life against manufacturer's defect. If you experience a failure due to defect, please complete the return form on Lykke's website, mail back to Lykke the defective product, and they'll send you a new replacement in short order. Simply put, Lykke stands behind our products and wants to get you back to Making Happy with LYKKE Crafts.