Our aluminum axles are precision-machined from high-quality 6061-T6 aluminum for durability and strength. The keyway is 1/4 inch wide and runs14 inches long. The axles have a total length of 15 inches and have a 1 inch diameter. These axles are Light weight perfect Drag Race Mini Bikes. The Axle only weighs 1 Pound 2 oz. Axle only. No other parts included.