4pcs Stainless Clamp on Fishing Rod Holder for Rails 7/8″ to 1″. 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 Rubber insert to protect your fishing rod from any wear against the stainless surface Rod holder can be adjusted to 32 different angles when mounted;Easy to install, mounting bracket includes bolts (allen key not included). Drain holes at base of rod holder to drain any captured water.