Product review (4 stars): Solid heavy product
These are definitly metal, they are heavy enough that they stay in place and liquids do not seep underneath them when spilled.  The edges could be bevelled a little because they are quite sharp.  I have only had them on my stove sides for a week and I have scratched myself 3 times on it (never broke the skin, but still, ouch).  They are very shiny and reflective, not quite mirror like, but close enough so that out of the corner of my eye I feel as though it looks like there is a huge gap between my oven and the counter, but upon actually looking at it straight on its fine.  Just a bit of an unexpected optical illusion.  And unforunately (or I guess fortunately) it cleans easily to a reflective shine with a single sponge wipe.