1.Delivery scope: These WC seat hinges with screws contain 1 pair of toilet lid fasteners and 1 pair of 18 mm metal washers and 1 pair of 28 mm plastic washers. The fastening set meets your needs for a replacement part kit. It is not easy to break. 2.Improved stability: With a quick, easy installation process, the lower part of these blind hole toilet seat fittings is for any DIY enthusiast. The 1.3 cm narrow lower part allows for easy installation, and the screws automatically unfold to create a 3 cm wide stainless steel slider that keeps the seat firmly in place. The replacement is simple and robust. 3.WC seat fittings made of stainless steel: These WC seat fittings are made of highquality 304 stainless steel and PP plastic, sturdy and durable for longterm use. WC seat fasteners can make these WC hole screws tighter and firmer. Insert the toilet seat fastening screws into the WC installation hole. 4.Easy to install: Place the quickrelease toilet seat fittings into the WC lid hinge and then use a screwdriver to turn them for smooth installation, if with the 2 sets of washers included in the delivery scope. Install the WC cover and the WC seat hinges on fasteners once to solve the toilet problems. damaged and wornout WC seat hinges.