Consist of stainless steel component,rusts-proof,corrosions-resistant,high intensities and high elastics. Used for fixed on both end of the quickly release,play a elastics pad effect. It mainly used for fixing the two end of the quickly-release used as a spring pad. Easily to install,simply release and tighten quickly release Skewers for spring replacements. for bike front rear quickly release Skewers,Skewers hollows shafts,and axles fixed rod.