Susan Bates Luxite Plastic Crochet Hooks offer a warm; lightweight and inexpensive alternative to aluminum. Luxite is a specially formulated plastic material that is very durable. Our famous in line head helps reduce wrist motion for fatigue free crocheting and helps you maintain a more consistent gauge. This set contains six, 5 1/2″ hooks, in sizes F/5 (3.75 mm), G/6 (4 mm), H/8 (5 mm), I/9 (5.5 mm), J/10 (6 mm) and K/10 1/2 (6.5 mm).