The Hobie H-Rail Railblaza StarPort HD combines the popular Railblaza Starport HD mount with the Hobie H-Rail mount plate. The Starport HD base is a versatile multi-functional mount, which can be used in a variety of applications that allows users to fit and swap out the full range of Railblaza accessories. The unique slide locking mechanism confidently locks Railblaza accessories in place. The Starport HD base comes pre-installed on a Hobie H-Rail accessory mount plate. It clamps to the 12-sided H-Rail without any drilling or tools needed. When the clamp is secured, the mount plate does not twist or slide along the rail. Loosening the clamp allows you to remove the accessory or slide it along the length of the rail. Fits the H-Rail on all 2015 and later Pro Angler 12, 14, and 17 kayaks.