C. E. Smith Shipshape 55108A Pontoon Square Rail Adjustable Clamp-On rod holder. The rod holder is made with a clamp fits the square rails found on pontoon boats. Each rod holder comes with 2 protective liners, one to fit 1" and one to fit 1-1/4" square rail. The liners are round on the outside allowing the rod holder to be adjusted to any angle above the water, and the hidden left or right adjustment allows even more adjustment choices. Made from 304 stainless steel tube lined with a UV resistant black PVC and fitted with a chrome zinc alloy adjustable clamp. Angle to the left or right adjusts in 15 degree increments. Plastic insulator sleeves are included to help provide snug fit on the rail. 9" tall tube with 1-5/8" ID. Includes two pair of 304 stainless mounting screws and the hex key needed to make the rod from spinning. Solid bottom with drain holes prevents water from pooling.