Amarine-made Stainless Rail Mounted Clamp on Rod Holder for Fishing Boat - 25mm Rail - 6567S1 This product is a 100% brand new Amarine-made product Can be mounted to vertical or horizontal rails - Adjustable for rails 22mm (7/8") to 25mm (1") diam Rod holder can be adjusted to 4 different angles when mounted;Easy to install, mounting bracket includes bolts (allen key not included). ABS clamp to protect your tube from scratching