The Clicgear Deluxe umbrella holder has been designed to be used with golf trolleys. It helps comfortably adjust the angle of your cart umbrella both front and back as well as side to the side. You only have to clip it on to your golf trolley and then adjust the knobs to get the right angle and a tight fit. The Clicgear Deluxe Adjustable Umbrella Holder has been specifically designed for the Clicgear Trolley. It allows you to adjust the angle so that you have the umbrella is positioned to suit your needs.