With a simple design, this bicycle seat tube clamp is easy to install without hassle Made of high strength aluminum alloy to ensure the durability of wear Whether you're mountain or road bike, these clamps provide a secure, adjustable fit The bicycle seatpost clamp adopts screw and nut locking system, which automatically adjusts the angle and prevents deformation from concentrated stress when tightening The hollow structure greatly reduces weight so you can enjoy your bicycle without compromising strength, Manufacturer: Pffiocix