This attachment allows you to attach any accessory your heart desires to the Hobie H-Rail. The H-Rail Universal Mounting Plate is super-easy to drill and thru-bolt to and has the ability to clamp to the 12-sided H-Rail without having to use additional tools or drilling. Once you have the Mounting Plate secured you don't have to worry about it twisting or sliding on the rail while you're out on the water.