Rocket2 [squared] Click Kit - Standard Tips (13cm/5")The addiClick interchangeable needle set is the only complete system which provides a patented click in tip that will never come unscrewed while knitting. No tools are required to make a quick tip change; simply insert the cord deep into the tip, twist and release. Thanks to the Clicks revolutionary locking mechanism, the tips will remain secure until you choose to change them. The addiClick Rocket2 [squared] set includes: 8 sizes of addiClick Short