EASY TO USE: Put these toilet seat screws in the toilet mounting holes. The rubber grommets have a threaded section so you can just push them into the holes in the top of the toilet pan and when you tighten the screw it expands and tightens itself intothe hole, without the need of a bolt on the other end of the screw. Convenience and saving time.ONCE AND FOR ALL: You only need to install the toilet cover and the toilet seat hinges top fixings once. There is no need to worry about toilet problems anymore, they can be used for several yearsQUALITY MATERIAL: Composed of rubber and metal, the rubber jacket is more resistant to dirt and wear, has a better expansion effect, and is not easy to break. Metal screws are less prone to rust under the protection of rubber and can be used for a longertime.Delivery Quantity: 2 pairs,Size: The detailed size is shown in the pictureColor: silverKind tips1. Package content: only the above package content, excluding other products.2. The size is measured manually, please allow 1-2 cm measurement error3. Due to different displays and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.