Can be mounted vertically or horizontally on rails. Compatible with rails ranging from 32mm (1-1/4") to 40mm (2") in diameter. Allows for adjustment to 32 different angles when mounted. Includes mounting bracket with bolts (allen key not included). Features drain holes at the base to avoid water accumulation.Made of marine grade 304 stainless steel with a clamp-on mounting bracket.Comes with a rubber insert to secure fishing rods from wear against the stainless steel surface. Ideal for fishing boats with limited gunwale space.