: This toilet seat fastener set is made of plastic, rubber, and heavy-duty 304 stainless steel. It offers exceptional strength and stability to securely fix your toilet seat. Durable, rustproof, and corrosion-resistant, it is superior to most plastic fasteners. UNIQUE DESIGN: Plastic plates are less likely to rust than metal plates. When tightening the screw, the washer will be pushed into the hole; avoid overtightening to prevent pushing it through. The screws feature solid brass threads inside, which are resistant to rust. EASY TO USE: Installation is simple and quick. Insert the rubber nut into the hole, then insert the screw through the washer and plastic plate into the rubber tightening nut. Tighten the screw and align the pin with the stainless steel base. Insert into the toilet seat mounting hole. WIDE APPLICATION: These toilet seat accessories are universal and fit most standard toilet seats with top hinges. (Refer to product images for detailed dimensionsmeasure before purchasing to ensure compatibility.) This toilet seat installation kit is ideal for replacing damaged or old toilet seat hinges.