SUPER EASY: With the SmoothLever quick release seatpost clamb you can change the height of your seatpost in seconds thanks to the quick release lever. Simply open the quick release handle, change the height and close the handle again IDEAL DESIGN: This seatpost clamb has a special and smooth design to avoid any leg interaction so you can go rough whenever you want MULTIPLE SIZES: The SmoothLever is available in the most common sizes: 28.6mm, 31.8mm and 34.9mm. It is important that the inside diameter is measured very precisely with a caliper to make sure you have the right seat post size DURABLE AND STRONG: This quick release bike seat clamp is made of durable aluminium but only weighs 40 grams. It can be used for all aluminium seatposts PART OF YOUR RIDE: BBB Cycling offers a wide variety of bike repair tools. Tools for on the road for cyclists who suffer from bike damage along the way, and workshop tools for all maintenance before and after your ride, Weight: 0.110231131 pounds, Manufacturer: BBB