Features: 1.Application: Marine fishing pole converter is suitable for rod holder with OD of 1?9/16in / 3.97cm or smaller, can be used with 30 degree or 90 degree rod holder. 2.Advantage: Allow the tip of the fishing rod to follow the trajectory of the fish, ensure that the fishing line passes freely on the rollers and prevent any friction. 3.Characteristic: Fishing pole converter will increase the depth of your rod holder pin by 1?1/2in / 3.81cm. The top swivel part has drain holes so it won't hold water. 4.Easy to Operate: Fishing pole converter can be swivelled instantly to convert any in gunnel rod holder to a swivel rod holder. 5.Premium Material: Rod holder swivel adapter is made of 304 stainless steel for maximum durability, rust resistance, can be used in marine environment. Specification: Item Type: Fishing Pole Converter_x000D_ Material: Stainless steel 304_x000D_ Height: Approx. 58.5mm/2.3in_x000D_ Outer Diameter: 38.1mm/1.5in_x000D_ Application:_x000D_ Suitable for rod holder with OD of 1-9/16in / 3.97cm or smaller_x000D_ Characteristic: Can be used with 30 degree or 90 degree rod holder