The RAILBLAZA Fixed Extender gives paddlers another 5 inches of height on any StarPort compatible RAILBLAZA accessory. The top of the Fixed Extender has a snap lock to secure your accessory in place. This extender is meant for horizontal surfaces and cannot be used vertically. Use the Fixed Extender to raise your RodHolder II, when the butt of your fishing pole is over 6 inches long. Base not included.