Easy InstallationThe toilet seat fixing kit comes with all fittings for installation. Please put the toilet seat screws in the toilet mounting holes. There are threaded sections in rubber grommets so you can just push them into the holes in the top of the toilet pan. When you tighten the screw it expands and tightens itself into the hole, without needing a bolt on the other end of the screw Premium MaterialThe soft close toilet seat hinges are made of high-quality rubber and metal, sturdy and durable, with good toughness, stable structure and a better expansion effect, besides the rubber cover protects screws from dirt and wear, break and rust Package IncludesYou will receive 4 packs of toilet hinges replacement with expansion rubber bolts, nuts, washers and screws. You only need to install the toilet cover and the toilet seat hinges top fixings once and can be used for several years Universal SizeThe size of the toilet seat hinges fittings is suitable for 14 - 16mm holes. Please kindly refer to the picture size before ordering Wide ApplicationThe toilet seat hinges are suitable for most standard toilet seats with a top fix hinge, ideal for replacing back-to-wall or wall-hung toilet pans, a perfect fixing kit designed for WC toilet seatings