1. 【High-quality materials】: The toilet seat installation screws are made of high-quality rubber and stainless steel. They have good flexibility, are durable, and are not easy to slip off, break, or rust. 2. 【Package contents】: The toilet seat installation kit includes 2 pairs of expansion bolts, including expansion balls, bolts, and washers. 3. 【Universal toilet seat screws】: These toilet seat screw accessories are universal and are suitable for toilet seat holes of 13 - 18mm. They fit most standard toilet seats. 4. 【Easy to install】: You can easily assemble them within a few minutes. Insert the toilet seat screws into the toilet seat installation holes and tighten the screws, which is convenient and time - saving. 5. 【Perfect repair】: Replace the old fixtures by connecting the toilet seat screws to firmly fix the toilet, perfectly repair the defects of the toilet's soft - close device at home, and save a large amount of money on a new purchase.