Using these KnitPro Mindful Collection needle tips is easy. First, pick the cable you like - either swivel or non - swivel. Then, simply screw the 4 - inch US size 4 lace needle tips onto the cable. When making a 16 or 20 needle, make sure to use the 4 tips. As for maintenance, keep them in a dry place to prevent rusting. After use, you can gently wipe them with a soft cloth. Also, remember that although all tips fit all cable sizes, the right combination matters for the best knitting experience. Don't worry if your product comes in a KnitPro package - it's still the same great quality tool.