AL Bicycle Wheel Hub Front and Rear Quick Release Skewer. [Special Design] The springs are fixed on the nuts so that not easy to lose. [Durable]Great Quality Hub quick release ensures for long time use. [Length] Front:112 mm /Rear:148 mm [Weight] Front: 50g /Rear: 59g. [Material] Steel Axle and Aluminum alloy Clamp. [Origin] Made in Taiwan.