LYKKE Indigo 15cm (6") Interchangeable Crochet Hooks are perfect for Tunisian crochet. 
Named after the Norwegian word for happiness, LYKKE combines high-quality materials and thoughtful design to produce beautiful, durable, happy-making crochet hooks. Made of birchwood, they're soft and warm to the touch and smooth on the yarn.
 
The LYKKE Indigo 15cm (6") Interchangeable Crochet Hooks are available in 14 sizes from 3.5mm (E4) to 12.75mm (US17):