[High quality]: The toilet seat spacer bolt is made of rubber and solid 304 stainless steel, which is extremely durable, safe, strong, not easy to slip, break or rust and has a longer service life. [Size]: The height of the toilet seat extension screw is 4 cm, the upper part is 2.2 cm, and the lower part is 1 cm .3 cm. Suitable for opening 1.3-1.8cm. [Easy to install]: The rubber seals in the suit have threaded parts, so you just need to push them into the hole upper part 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 clever design offers you a lot of convenience. Box contents: 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 nuts in 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 fixing of the toilet lid hinge. 1. Simply slide into the holes. 2. Insert the gasket provided. 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 goes 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.