Amarine-made Stainless Rail Mounted Clamp on Rod Holder Fishing Boat - 25mm Rail - 7744sx25 ABS clamp to protect your tube from scratching Rod holder can be adjusted to 4 different angles when mounted High quality, marine grade 304 stainless steel rod holder with ABS clamp-on mounting bracket Can be mounted to vertical or horizontal rails-Adjustable for rails 22mm (7/8") to 25mm (1") diam Easy to install, mounting bracket includes bolts (allen key not included),Ideal for fishing boats with rails, where gunwale space may be limited