Excellent material: The toilet seat fixing screw is made of high quality rubber and stainless steel. Good flexibility, sturdy, durable, not easy to slip, not easy to break and rust. Package Contents: The toilet seat fixing kit includes 2 pairs of screws. expansion, including expansion balls, screws and washers. Universal Toilet Seat Screws: These toilet seat screw accessories are universal, suitable for openings 13-18 mm and fit most standard toilet seats. Easy to Install: You can easily assemble them in minutes. Insert the toilet seat screw into the toilet installation hole and tighten the screw, which is convenient and time-saving. Perfect Repair: Replace the old fixing parts by connecting the screw of the toilet seat, firmly fix the seat, and perfectly repair the defects of the soft-closing mechanism of the toilet at home, and save a lot on the new purchase.