Features1Made of steel and aluminum alloy, strong and durable. 2Smooth cam action lever. Extruded CNC machined nut. 3Quality quick release anodised alloy seat clamp skewer. 4Easy to set up and quick installation, for replacement.SpecificationThe road mountain quick release are made of steel and aluminum alloy, durable and practical for most bikes.Features:Made of steel and aluminum alloy, strong and durable.Smooth cam action lever. Extruded CNC machined nut.Quality quick release anodised alloy seat clamp skewer.Easy to set up and quick installation, for replacement.Specifications:Material: Steel & aluminum alloyAxle diameter: about 4.5mmFront Skewer Size: 155mm / 6.1inRear Skewer Size: 190mm / 7.5inColor: Black and silverPackage Size: 28 * 6cm / 11 * 2.4inPackage Weight: 95g / 3.4ozPackage List:2 * Bicycle Wheel Hub SkewersPackage List2 * Bicycle Wheel Hub Skewers