【Premium Material】The toilet seat hinge clips are made of rubber and stainless steel, rubber is more resistant to dirt and wear, and not easy to break.Under the protection of rubber, the metal screws are less prone to rust and durable for long-term use. 【Easy to Install】The rubber grommets have a threaded section so you can simply insert them into the holes at the top of the toilet bowl.When you tighten the screw, it expands and pulls into the hole without the need to screw in the other end of the screw. 【Hinge Plates】Round hinge plate can make these toilet hole bolts more rigid and stronger.When tightening the screws as the washers push through the holes, you must be careful not to tighten the screw so much that it pushes through the washer. 【Wide Applications】A strong, reliable and sturdy mounting kit specially designed for toilet mounting brackets.Toilet lid seat fittings fit most standard toilet seats with Top-Fix hinges.Convenience and time saving. 【Package Includes】You will get 2 pieces toilet hinge blind hole fittings with expansion rubber bolts, nuts, washers, easy for your daily use.You only need to assemble the upper fixings of the lid and toilet seat hinge once, which can be used for several years.