The RAM ROD® HD Fishing Rod Holder with Bulkhead/Flat Surface Base (RAP-433-BMP) is built for rugged environments and is ideal for larger fishing rods, including both spinning and casting setups. It features a rotating ring to keep your rod secure, plus a swing-arm rod stop that easily converts the holder into a tube-style design when needed. Compatible with both C-size and B-size hex ball bases, this kit includes a 6" spline post and a bulkhead/flat surface mounting base. It also offers GoPro® compatibility with an integrated attachment point for the factory GoPro mount. Alternatively, you can use the RAM® Ball Adapter for GoPro® Mounting Bases with a double ball mount to secure other small devices such as action cameras, phones, and more.