【Premium Material】The toilet seat hinge fasteners are made of rubber and stainless steel, the 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】The round hinge plate can make these toilet hole bolts more rigid and stronger. When tightening the screws that the washers push into the holes, you must be careful not to tighten the screw to the point that it pushes through the washer. 【Wide Applications】A strong, reliable and sturdy mounting kit specially designed for toilet mounting brackets.