Astro-Nuts axle nuts are not only the easiest way to reduce weight on your skates, but also a fun, new way to express yourself by personalizing your skates with various colors. Astro Nuts feature a 100% molded, nylon construction with makes them 3 times lighter, and equally as strong as standard axle nuts. With Astro-Nuts in so many colors, you can have a different set for every day of the week. Give your skates some flair with Astro-Nuts.