Whether you're a novice or an experienced crocheter, this versatile assortment of hooks in this aluminum and steel crochet hook set allows you to make a wide range of creative projects. Featuring high-grade lightweight construction, the hooks feature rounded heads to prevent snagging and splitting. Sizes are marked on each hook for easy identification. Boye crochet hook set comes with (16) steel crochet hooks, (8) aluminum crochet hooks, and (1) 5" x 7" carrying case. Steel hook sizes: 00 (3.5mm), 0 (3.25mm), 1 (2.75mm), 2 (2.5mm), 3 (2.1mm), 4 (2mm), 5 (1.9mm), 6 (1.8mm), 7 (1.65mm), 8 (1.5mm), 9 (1.4mm), 10 (1.3mm), 11 (1.1mm), 12 (1mm), 13 (0.85mm), and 14 (0.75mm). Aluminum hook sizes: D (3.25mm), E (3.5mm), F (3.75mm), G (4.25mm), H (5mm), I (5.25mm), J (5.75mm), K (6.5mm).