Using these KnitPro Mindful Collection interchangeable lace needle tips is easy. First, choose the cable that suits your need, whether it's a swivel or non - swivel one from the Mindful Collection. Then simply screw the 4'' US 11 needle tips onto the cable. When making a 16 or 20 needle, always use the 4 tips for a functional setup. As for maintenance, after each use, gently wipe the needle tips with a soft cloth to keep them clean. Store them in a dry place to prevent rusting. And don't worry if your package comes in the new KnitPro look; the great quality of the tools hasn't changed.