1)size:0.6mm;0.75mm;1.0mm;1.25mm;1.5mm;1.75mm;2.0mm;2.5mm;3.0mm;3.5mm;4.0mm;4.5mm;5.0mm;6.0mm 2)Material:steel, aluminum, pla Steel crochet hooks 1)size:0.6mm;0.75mm;1.0mm;1.25mm;1.5mm;1.75mm;2.0mm;2.5mm;3.0mm;3.5mm;4.0mm;4.5mm;5.0mm;6.0mm2)Material:steel, aluminum, plastic, or bamboo, and they come in many sizes. 3)High quality Steel Crochet Hook