?【Double Screw Fastening】The handlebar height adapter is equipped with double screw locks and steel screws to make the handlebar tighter and prevent the handlebar from loosening and falling off, reducing hidden dangers when riding. ?【Sturdy Material】The handlebar height adapter is made of refined aluminum alloy, high toughness, no deformation, corrosion resistance, sturdy and durable. ?【Comfortable Cycling】You can properly adjust the handlebar height with the lift accessory so you can maintain traction more easily on steep hills, giving you a comfortable and easy riding experience. ?【Adjustable Height】The height of the bike fork bar extension is 13.8*2.86 cm/5.43*1.13 inches with a wrench and a maximum height of 10 cm, adjusting the height can effectively reduce the pressure on your lower back. ?【Wide Compatibility】The bike stem extension is suitable for most bikes, mountain bikes and road bikes with 28.6mm threaded bars.