Motorcycle Handlebar Riser Metal fit for Honda Motorbike "Easy installation: No drilling or welding is required, and the compact size enhances the appearance of the motorcycle. which can cope with heavy rain, muddy roads and other extreme driving conditions" 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.