Knitters Pride Basix Tunisian IC Crochet Hook 20mm or 25mm
 
Use them as traditional crochet hooks, or attach them to the same cords that are used for the Knitter’s Pride Interchangeable knitting needles.
The join between the cord and hook is smooth to enable stitches to slide around easily. Ideal for projects with large number of stitches.
 
Cables sold separately.