GuDez Toilet Seat Hinges Screws Expanding Rubber Bolts Top Nuts Set for Top Mount Toilet Seat Tightening Kit ReplacementToilet Seat Blind Hole Fixing Kit for TOTO Toilets2 Pack

I lost one of the original seat bolts for my Washlet and this worked perfectly. Easy to install from above without the need to reach under to hold a spinning bolt. I was able to tighten securely enough for a stable seat.

Very good

These things are STURDY and are about 2.5 inches long. Long gone are the days of tightening the toilet seat lid every couple of weeks- I imagine these will stay tight for quite a long time since the screws are so long. These are much better than the flimsy ones they replaced, and are a great value ! Compatible with our american standard straight walled toilet.

These expandable rubber bolts greatly simplified installation of the toilet seat. I highly recommend using them.

I was initially VERY frustrated by these since I couldn't seem to tighten the screws. They just kept turning and turning and the toilet seat remained wobbly. I was about to lose my mind when I remembered some video where they were saying "just keep turning even if you think it's doing nothing". I finally tried that (while pushing down using a little force) and they did actually begin to tighten eventually. Don't give up. It will never mimic a good ol' screw and wing nut but since that's not an option with a skirted toilet, I'm satisfied enough and the seat did tighten up quite a bit.