Upgrading your bike or just need a more secure nut for your quick-release axle? This black M5 anti-skid nut is a slick little upgrade. It's made from durable aluminum alloy, so it's strong but lightweight. The special anti-slip surface design gives you a much better grip when tightening it down, and it comes with an anti-slip washer to help prevent it from loosening up during your ride. That means no more worrying about your wheel or other components coming loose unexpectedly. It has a standard M5 screw thread, so it's compatible with most bicycle quick-release axles (just note, it won't fit barrel shaft quick releases). Installation is stupid easy—just screw it on in place of your old nut. It's perfect for securing gear wheels on mountain bikes or making modifications on road bikes. It's a small part, but it adds a touch of security and a clean, black look to your bike.