Product review (4 stars): Works OK on American Range with some RTV silicone to hold in place.
Bought for an American Range cooktop on which all the rubber grate feet had fallen out and been lost. These weren't a perfect replacement: the post was a bit smaller than the hole, so there's no way they would have stayed in place on their own. However, after filling the holes with black RTV silicone and then attaching the feet (letting the RTV flow out around the edges), everything has held together fine for the past couple of weeks of high-heat cooking.