Material: D-rings are made of heavy duty stainless steel, strong enough to be durable and resistant to oxidation The lashing rings are coated with a premium black protective coating to prevent oxidationStrong adhesive effect of the patch: The canoe d-ring patch is easy to fit and use strong adhesive effect Dont worry, just apply super glue on the bottom of the patch and stick it on the boat Use the rope to secure the object to the paddle etc.Product: Lightweight and doesnt take up much space on the boat You can adjust the tightness of the rope yourself, you can easily lock the rope in place to secure any size itemsUses: D Ring Patches for Rescue Rope Scoops Cargo Thigh Straps Premium PVC Inflatable Boat Replacement Accessories Rubber Stand Up Paddle SUP Surfboard etc (without glue)Delivery Quantity: 4pcsProduct color: blackProduct size: 110*110*15mm