The Knook makes it easy to create a knitted look without knitting. It is a specialized crochet hook with an eye at the end for a cord to go through. The cord keeps the stitches from unravellling as you knook. A strong smooth finished cord is required for knooking (i.e. - rattail). Set includes 2 plastic The Knooks sized 8mm / L-11 and 10mm / N/P-15.