Toilet seat fastener designed for universal and most toilet seat brands, toilet lid screws can be easily installed on most standard toilet plates.Suitable for 28mm holes: Toilet seat bolts and bolts can fix the toilet lid perfectly, so you don't have to worry about the instability of the toilet seat.Easy to install: Insert the toilet seat screws into the toilet mounting holes. The rubber ends are threaded so you can easily insert them into the holes at the top of the toilet bowl. When you tighten screws, it expands and retracts itself into the hole. No screw required on the other end, superior performance, comfort and time saving.Stainless material: Black rubber (expandable ball) / ABS plastic (round cards) / Stainless steel (screws and washers). Made of strong metal hinges and bolts, better than most plastic mounts, reduces maintenance costs.Delivery content: 2 pair of wc seat mounting set. Suitable for 28mm holes of the toilet seat.