Strong Adhesive Effect: this D shape patch easy to install and use, strong adhesive effect, no worry falling. Simply apply glue to the bottom of the patch and stick it on the boat. Use ropes to fix the items, paddles and so on. Replacement Accessories: D Shape Patch is used for safety rope, bailer, cargo, thigh straps. Great replacement accessories for PVC inflatable boat, raft, dinghy, kayak, canoe, stand up paddleboard surfboard and more Light weight: Light weight and it will not take too much space stick on you boat. You can adjust the tightness of the rope by yourself, you can easily lock the cord in place to hold down any size item.For PVC Inflatable Boat Raft Dinghy Kayak.the D shape is made of 304 stainless steel and high-quality PVC Sturdy, durable &corrosion-resistant in long-term use. even in wet environment and salty water. Diameter: 9cm/3.54inch Material: Stainless Steel PVC Package Includes:6 Pieces Kayak D-Ring Buckles