22/28mm Universal Motorcycle Handlebar Riser Mount Heightening Clamp "Professional and practical design, beautiful and generous, make your motorcycle more beautiful. allows you to get a more comfortable ride and easier reach." Just slide the stem extender onto the steerer tube and tighten it, very easy to fit. The handlebar height adapter is made of refined aluminum alloy, high toughness, no deformation, corrosion resistance, sturdy and durable.