Feature●[Anti-Theft] 7-Lobe Pin Enhanced security, prevent removing wheels by hands. (7-Lobe wrench attached)●[Durable]Great Quality Seatpost quick release ensures for long time use●[Material] Aluminum alloy nut and cr-mo Axle●[Size] M6x45mm , making it easy to install on most bike models.●[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.Description