This is where it all starts. The StarPort™ mount can be fitted horizontally or vertically in minutes, and comes complete with all fastenings. The locking slide holds the RAILBLAZA accessory in place until you need to remove it. The StarPort™ can be dedicated to a single accessory, or re-tasked for others, depending on your needs. Each StarPort™ includes a stylish locking slide for securing accessories firmly in place. All hardware included. 2 3/8"dia. x 2 5/8"H. Available in Black or White, single unit.