Roswell SI Swivel Option:Include Swivel Clamp Adapter Included Fins with 5' 2":

Included Fins with 5' 2": 2 x 4

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Patented weight-assist system

Full Range Volume Controller Included

Roswell SI Swivel Option:Include Swivel Clamp Adapter Included Fins with 5' 2":The SI Swivel System is a competitively priced upgrade to increase the convenience and functionality of your board rack. With three locking positions, the SI Swivel allows safe loading and unloading of your boards without concern of dropping your board or damaging your boating equipment. If you're installing the Roswell SI Swivel with a Roswell clamp mount, you'll want to choose the option to include the Swivel Clamp Adapter for level swivel motion.