1.Metal materials: wheel hub skewers for bicycles are made of metal materials, which are very robust, wearresistant, heatresistant and high strength. They have good durability and stability, are not easy to break or damage, have a long life and can ensure longterm use 2.Quick release design: the road bike clip lever adopts a quick release design, allowing you to adjust the height of the bike seat quickly and easily. Easy to use, no complicated steps required 3.Easy to install: the bicycle quick release lever is easy to set up and install without tools. It is suitable for bicycle enthusiasts and provides a convenient and laboursaving solution for cyclists 4.Package contents: the front and rear bicycle wheel hub clamping screw contains 2 quick release rods. The length of the front quick release rod is 145 mm/5.7 inches, suitable for a front fork opening of approx. 100mm/3.9'. The length of the back quickrelease lever is 185 mm long and is suitable for a rear frame opening of approx. 135mm