Using these KnitPro Mindful Collection needle tips is easy. First, choose the cable you want, either with or without a swivel. Then simply screw the 4'' US 13 lace needle tips onto the cable. If you're making a 16 or 20 - inch needle, make sure to use the 4'' tips. As for maintenance, keep them in a dry place to avoid rust. After each use, you can gently wipe them with a soft cloth. And don't worry if your package comes in the new KnitPro branding - the quality of these tools is as great as ever.