These SHENGHUISS Boat Flip Up Cleats are made of 316 marine grade stainless steel, which is highly resistant to corrosion, rust, and wear. They are designed to provide long-lasting performance and durability in harsh marine environments. The flip-up design allows for easy storage and transportation, and the stainless steel material ensures that they will not corrode or rust even in saltwater conditions. The cleats feature a strong and durable construction, with a wide base and a secure locking mechanism to ensure that they remain firmly attached to the boat. The cleats are easy to install and require no tools or hardware, making them a convenient and affordable solution for boat owners.