Clover Soft Touch Crochet Hooks have an optimal shape for smooth crochet work, a special handle that is ergonomically correct and has an oval shaped soft rubber cushion for comfort. The Crochet hook is made of steel and the handle is made of ABS plastic resin. Details: US size 0 / 1.75 mm Suitable thread size #8 to #18 Each hook comes with a safety cover to keep you needle protected when not in use Steel and ABS plastic resin