Fit FOR Harley Softail Breakout Fat Bob Fat Boy Road Motorcycle 1.25" Handlebar Riser and Clamp Kit "Enhance the motorcycle's handling and steering responsiveness. Improve riding comfort and handling, thereby elevating the overall riding experience." 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.