Features: Can be used for kayak fishing boat, it can also be caught on a yacht railing. for Tough, corrosion proof, durable and long lasting. Firmly and securely holds both conventional and spinning rods. Can be mounted securely to a rail, side or flush to the gunnel of a boat / kayak. The outer diameter of the tube is 50.8mm (2"), the inner diameter is 43mm, and the length is 230mm. It can clamp steel pipe guardrails with diameters of 25MM (18-26mm), 32MM (28-32mm) and 51MM (43-51mm). 360 degree adjustment, locked at any angle. A rubber pad is provided inside, which locks more powerfully and protects the installation railings. Package Includes: 1x Fishing Rod Holder Specifications: Material:Stainless Steel Length: Approx.23cm/9.05inch Type:18-26mm Type:28-32mm Type:43-51mm Color:Silver note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.