Theaddi Click Rocket 2 Squared Short Tip Set provides 8 different sizes ofaddiClick Rocket 2 Squared Short Tipstips (US 4, 5, 6, 7, 8, 9, 10 and 11),five different lengths of extremely pliable blue cord (16″, 20″, 24″, 32″ and 40″), and one connector piece which helps to either store stitches or combine your cords, 1 addiGrip to make changing tips even easier and 1 addi Needle Gauge. TheClicktips require no tools to change; simply insert the cord deep into the tip, twist and release. The tips will remain secure until you change them, thanks to theClickrevolutionary locking mechanism!