These Susan bates crystallites crochet hooks are beautifully colored translucent plastic crochet hooks. Each fun color is a size so you can find the size you need at a glance. These hooks famous in line head helps reduce wrist motion for fatigue free crocheting and helps you maintain a more consistent gauge. Protect and store this fine set of hooks in the handy vinyl case. This set includes sizes 4 mm, 5 mm, 5. 5 mm, 6 mm and 6. 5 mm.