Using these KnitPro Mindful Collection needle tips is a breeze. First, choose the cable you want, either swivel or non - swivel. Then, simply screw the 5'' US 10.5 lace needle tips onto the cable. Remember, if you want to make a 16 or 20 needle, use the 4 tips. As for maintenance, keep them in a dry place to prevent rusting. Wipe them with a soft cloth after each use. Don't worry about the new KnitPro packaging; the quality of these tools is as good as ever.