Susan Bates Silvalume Crochet Hook Set in Pouch Sizes F, G, H, I, J, K These silvalume hooks is made of lightweight aluminum Each hook undergoes a special anodizing process that etches away all surface impurities Each hook is heat treated for strength and durability and polished for a velvety smooth finish These hooks famous in line head helps reduce wrist motion for fatigue free crocheting and helps you maintain a more consistent gauge Each gift set contains six hooks in us sizes 3.75-mm, 4-mm, 5-mm, 5.5-mm, 6-mm and 6.5-mm