Drain hole at base of rod holder to drain captured water Rod holder can be mounted to vertical or horizontal rails Fishing rod holder adjustable for rails 32mm (1-1/4″) to 50mm (2″) diam Boat Rod holder can be adjusted to 32 different angles when mounted Rubber insert to protect fishing rod pole from any wear against the stainless surface Stopper slot built into the base of the rod holder to located the rod butt into position Boat fishing rod holder easy to install, mounting bracket includes bolts (allen key included) Package 4 x Fishing Rod Holder for Boat (Stainless Tournament Style Clamp on Pole Holder for Rails 1-1/4″ to 2″) Rod holder can be mounted to vertical or horizontal rails Fishing rod holder adjustable for rails 32mm (1-1/4″) to 50mm (2″) diam Boat rod holder can be adjusted to 32 different angles when mounted White rubber insert to protect fishing rod from any wear against the stainless surface Stopper slot built into the base of the rod holder to located the rod butt into position.