The Addi Click Hook set is intended as a booster pack for your existing Click sets. This set includes Addi crochet hook tips in sizes 3.75, 4.0, 4.5, 5.0, 6.0, 7.0, 8.0, and 9.0 mm in a sturdy snap-closed case. The tips can be used with the cords from either your Addi Turbo or Addi Lace Click sets. Click a hook on and pick up stitches, bind off, or work Tunesian crochet easily and quickly. You can even attach a hook to one end and a needle tip to the other for inventing your own stitches.