Purchase Notice: It Is Not Suitable for Shooting When the Riding Speed of Electric Vehicles and Motorcycles Exceeds Size 30. Since the Pole Is Fixed at a Single Point, It Is Normal That the Rod Is Pulled out Too Long and Will Shake. Please Check Installation &. Instruction before Installation and Use: Tighten Clockwise and Loosen Counterclockwise. Only after Each Section Is Pulled out Can It Be Tightened.