ONIPAX Bike Release Skewer's Nuts with Springs

[Enhanced Design] Specially designed fixed spring mechanism that keeps the springs securely in place during tire changes and other maintenance tasks.  [Material]: NUT:Aluminum alloy；SPRING:304 Stainless Steel  [Size]: M5; Out diameter: 20mm; Height: 17mm  [Package includes]: 2 x Bicycle Wheel Hub Nuts + 6 x Springs  [Origin] Made in Taiwan. We pride ourselves on product quality. Let us help you if you have any questions, we will be glad to assist you.