This set of pans (12x9.7x1) is what I needed to use in my toaster oven, they fit just right. I use them everyday with no issues. The pan alone is not 18/10 stainless steel, it's 18/0, I'm not sure about the rack, but mine has not buckled yet in 350° oven. I would recommend drying the pan after washing, I hand wash mine in the sink. I don't put them in the dishwasher. The description does say: Made from premium 18/0 stainless steel, I didn't read that until later on. The pans were too light weight to be solid stainless, I would still recommend them.