HIGH QUALITY MATERIAL: This toilet seat fastener set is made of plastic, rubber, and heavy-duty 304 stainless steel. Offers exceptional strength and stability to secure your toilet seat. Durable, rustproof, and corrosion-resistant, providing superior performance compared 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 damage. Screws feature solid brass threads for added durability and resistance 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. Secure into the toilet seat mounting hole. WIDE APPLICATION: These toilet seat accessories are universal and compatible with most standard toilet seats featuring top hinges. (Refer to product images for detailed dimensions; measure before purchasing to ensure proper fit.) This installation kit is ideal for replacing damaged or worn toilet seat hinges.