The addi Click Hook set is intended as an upgrade or "booster pack" to the existing Click sets * Includes 8 Addi hooks in sizes 3.5mm, 3.75mm, 4.0mm, 4.5mm, 5.0mm, 6.0mm, 8.0mm, and 9.0mm * Does Not include connectors or cords * Designed and manufactured in Germany to exacting standards and using finest materials available * Lifetime Guarantee from any manufacturer"s defects