The Clicgear Steering Knob is designed to make turning or steering your cart much easier. It allows you to maneuver your cart with ease with one hand. The ergonomic design works just as well with either hand, too. The Steering Knob easily screws into the umbrella mount on your Clicgear Model 1.0, Model 2.0, Model 3.0 and Model 3.5 Plus Cart to make maneuvering the cart much simpler. It cannot be used at the same time with your standard umbrella holder or the Clicgear Umbrella Angle Adjuster.