Love2Knook Knooking Set 10 hook sizes, US F5/3.75mm to 15/10mm, for knooking projects with lace to bulky weight yarns Includes 4 Denise knooking cords 30 inch (1 white, 1 blue), 40 inch (1 white, 1 blue) Includes basic "How to Knook" instructions. Hooks and case made in the USA. Hooks are compatible with any Denise Interchangeable Knitting and Crochet product.