Using these KnitPro Mindful Collection interchangeable lace needle tips is easy. First, pick the cable that suits you, whether it's a swivel or non - swivel one. Then, simply screw the 5'' US 15 needle tips onto the cable. When making a 16 or 20 needle, make sure to use the 4 tips for a proper setup. As for maintenance, keep them in a dry place. You can clean them with a soft cloth. And don't worry if your package says KnitPro; it's still the great - quality product you're used to.