Features: The pontoon boat bumper clip is designed to help you easily and quickly adjust the position of your fenders to suit a variety of docking scenarios, and when you need to retract your fenders, simply remove the boat bumper hanger. The pontoon fender clips are designed to clamp on 1" and 1-1/4" square tube rails securely, The diameter of the rope passing through the hole must not exceed 3/8". The pontoon fender hanger easily slides along the bumper to quickly reposition the pontoon bumper where you need it. It is easier to pass the rope through the hole from top to bottom, and then knot the rope at the upper end to complete the rope preparation. Made of Marine grade Nylon, Excellent seawater corrosion resistance and durable. Package includes: 4 Pcs Boat Bumper Clips, Gray Nylon