Using these KnitPro Mindful Collection needle tips is easy. First, pick the cable that suits your needs, either with a swivel or without. Then, screw the 4'' lace needle tips onto the cable. When making a 16 or 20 needle setup, make sure to use the 4'' tips for a functional result. As for care, after each use, gently wipe the needles with a soft cloth to keep them clean. Avoid using harsh chemicals as they can damage the stainless - steel material. Store them in a dry place to prevent rusting. Enjoy your knitting with these high - quality tools!