Scotty Rail Mount AdapterThe Scotty Rail Mount Adapter is the simple, reliable solution for mounting any Scotty post-mount rod holder to round or square rails on your boat or kayak. Compatible with 7/8" and 1" diameter round rails and 1" square rails, it expands the versatility of your Scotty rod holder system to virtually any vessel with a rail. Includes stainless steel fasteners for corrosion-resistant, long-lasting installation.Key Features Fits 7/8" & 1" diameter round rails — compatible with the most common round rail sizes on boats and kayaks Fits 1" square rails — versatile compatibility for a wide range of vessel rail configurations Compatible with all Scotty post-mount rod holders — expands your existing Scotty system to rail-mounted applications Works with Combo Side/Deck Mount (#790461) — compatible with Scotty’s popular combo mount Includes stainless steel fasteners — corrosion-resistant hardware for long-lasting freshwater and saltwater use The Scotty Rail Mount Adapter is the essential accessory for anglers who want to run Scotty post-mount rod holders on their boat’s rails — simple installation, universal compatibility, and built to last.