The addi Click Hook set is intended as an upgrade or "booster pack" to the existing Click sets. Each travel pouch contains 8 Addi hooks (3.5mm, 3.75mm, 4.0mm, 4.5mm, 5.0mm, 6.0mm, 8.0mm, and 9.0mm). Each hook is 6.5" long, and can be used as a fixed hook (instead of attaching them to the Click cords). When combined with the Click cords and/or tips, the sets are perfect for double ended crochet, created Cro-Needles, Tunisian crochet (with the addition of the HeartStoppers - sold separately), and much, much more. Set does Not include connectors or cords.