[High Quality]: The toilet seat spacer bolt is made of rubber and solid 304 stainless steel, which is extremely durable, safe, solid, not easy to slip, break or rust and has a longer service life. [Size]: The height of the toilet seat extension screw is 4cm, the upper part is 2.2cm and the lower part is 1cm. Suitable for 1.3-1.8 cm opening. [Easy to install]: The rubber gaskets in the suit have threaded parts, so you just have to push them into the hole top of the toilet. When you tighten the screw, it extends into the hole without the need for a screw on the other end of the screw. [Wide Scope of Use]: These toilet seat fittings are universal. They fit most standard toilet seats. The rubber expansion screws are the perfect choice for DIY enthusiasts and the smart design offers you a lot of convenience. Scope of delivery: 4 rubber corks, 4 metal discs, 4 screws. Features: Can be easily assembled in minutes. Just remove the old screw and insert the new screw. High quality rubber, smooth surface. Excellent toughness, not easy to break. Universal, suitable for broken or old toilet seat hinges. Features: 4 plastic nuts black rubber. Diameter: 13 mm. Length: 40 mm. 4 silver steel screws. Diameter: 6 mm. Length: 50 mm. 4 small silver metal discs. Diameter: 13 mm. Mount the binding toilet seat hinge. 1. Simply slip into the holes. 2. Insert the supplied gasket. 3. Tighten from above. Reminder: 1. When you tighten the screw, the washer is pushed into the hole. You must be careful not to tighten the screw so that it passes through the washer. 2. The round hinge plate makes these toilet hole screws stronger, which is ideal if your current fixings are loose. So your toilet seat only moves on the pan.