12 Sizes Aluminum Crochet Hook Set 2mm-8mm with Case The set includes 12 individual aluminum crochet hook This hook set employs durable aluminum that's polished for extra smoothness. Thread and yarn slide easily across their surfaces, making crocheting easy. Smooth aluminum surface in bright colors. Size: 2.0/2.5/3.0/3.5/4.0/4.5/5.0/5.5/6.0/6.5/7.0/8.0 MM