Stainless Steel Clamp-On Rod Holder. Stainless Steel. Type 316. Polished. Features and Benefits. Adjustable clamp to fit multiple pipe and tube sizes. For use on vertical and horizontal pipe/tube. Rotate and lock in fishing angle. Rotates and locks every 18. Form-fitted PVC White Liner. Specifications:. Clamp Fits (Outside Diameter):1-1/16" & 1-5/16" O.D. (Pipe), 1-1/4" O.D. (Tube). Location:T-Top Ring, Leaning Posts, Poling Platforms. Rod Holder Inside Diameter: 1-5/8"