EASY TO USE: Insert these toilet seat screws into the toilet mounting holes. The rubber grommets feature a threaded section, allowing them to be pushed directly into the holes on the top of the toilet pan. Tightening the screw causes it to expand and secure itself in place, eliminating the need for a bolt on the opposite side. This design offers convenience and saves time. FOR WOBBLY TOILET SEATS: Use these toilet seat fixing screws to replace the ineffective plastic inserts commonly included with new top-fix seats. Compatible with most UK standard size toilet seats with top-fix hinges. Fits 14 - 16mm holes. LONG-LASTING SOLUTION: Install the toilet seat and top-fix hinge hardware once and enjoy a secure fit for years. No need to repeatedly address loose or unstable toilet seats. QUALITY MATERIAL: Made from rubber and metal. The rubber jacket resists dirt and wear, provides excellent expansion, and is durable. Metal screws are protected by rubber, reducing the risk of rust and extending service life. 100% GUARANTEE: All products include a 12-month warranty. We offer a no-questions-asked replacement or refund guarantee. We are committed to delivering high-quality products that meet your expectations.