Using these KnitPro Mindful Collection interchangeable lace needle tips is easy. First, pick the cable you like, either swivel or non - swivel. Then, screw the 5'' tip onto the cable. You can use it for all your knitting projects. Remember, if you want to make a 16 or 20 needle, use 4 tips. As for maintenance, just keep them clean and dry. When not in use, store them in a safe place to avoid damage. Even though the packaging has changed to KnitPro, the great quality of these tools stays the same, so enjoy your knitting!