This set of needles from addi is perfect for projects that need precision. The long needles are easier on some hands. The sharp points allow for precise stitches, especially with lace and fine yarns. The convenient carrying case means that your needle set can travel with you, meaning you'll always have the right size needle for whatever project that you need to cast on. Includes needle sizes from US 4 (3.5mm) to US10 1/2 (6.50mm), several cords and a cord connector for a wide array of lengths. Also included is the key that locks and unlocks the unique click connection that is unique to addi Interchangeable Needles.