The pga tour umbrella holder will attach to your golf trolley and adjust to any square or round tubing from 15mm 06 to 30mm 12 the umbrella holder is official pga tour merchandise and its angle can be adjusted so it provides maximum rain protection the special rubber insert helps prevent slipping and there is a lever that keeps the umbrella handle in place the device will fit most push pull and electric trolleys and is easy to mount using the wing nut and bolts which require no too