Description: Package included: 30 pcs rivet for kayak and 30 pcs waterproof O rings that makes the rivets durable in the deep water. Product Size: 4.7x0.5cm/1.85x0.20inch. Rivet tool required for installation (tool not included) Great Material: The rivet is made of aluminum, durable, and good stress for long time use. Strong Holding Power: Back Side splits in for hold the materials together to make them strong enough Multi Functions: These rivets kit will work great on almost any application on kayak like rod holders, pad eyes, terminal ends, handles, etc. And shipbuilding, containers, industries construction, automobiles, furniture appliances and more. Specification: Material: Aluminum Alloy Color: Black Size Chart: Size: 4.7x0.5cm/1.85x0.20inch Package Includes: Kayak Rivet O Rings Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful shopping!