[Size]：The toilet bolt screw length is 2.9 inches, and the thread diameter is 0.55 inches. The fixing screws of the toilet cover are more stable than ordinary screws, preventing the toilet cover from sliding, and allowing you to sit comfortably on the stable toilet cover. [Easy to use toilet hardware]：Stainless steel Toilet seat hinge bolts and screws are much better than plastic ones.Replace your loose bolts with steel toilet seat hinge bolts, there will be no shaking toilet seat, and the nuts/bolts of the toilet seat will never be lost. [Extensive compatibility]：The toilet seat fasteners replacement hinge bolts is generally applicable to most toilet seats. Toilet hardware replacement bolts and nuts are compatible with TOTO, Kohler, American standard toilets,etc. [Easy to install] ：Toilet seat screw kit includes all installation parts:Stainless Steel bolts, Expanding Rubber Bolt Top nuts and xx washers. Universal toilet seat hinge bolts and screws can be installed with household tools in a few minutes. This is an effective way to solve the looseness and insufficient tightness of toilet seat ring nuts/bolts. [Durable structure] ：Toilet seat screws are made of Stainlee Steel Bolt, which can be used for a long time without slipping or rusting, and are closely matched. The toilet seat hinge bolt and nut kit also includes Expanding Rubber Bolt Top nuts for perfect fixing. The tool connecting the toilet cover plate and the toilet is easy to install and effectively solves the loose condition of the toilet cover plate