The ad said, poultry, roast chicken. I have used pop up timers before. These are much too large for chicken. I purchased these with the intention of using them for chicken. I bake chicken on a regular basis. These are for large turkeys. I was very disappointed. I cannot use them at, all. When I messaged the seller directly, they offered me a 10% refund. How ridiculous is that?! I still can't use them for chicken regardless of how much refund they offer. In their 2nd response, they threatened that to return the order to them would be very expensive and that I need to keep them. At this time, I had already processed the refund thru Amazon. Basically, if you want to use these pop up timers for chicken, but them somewhere else. These are not for chicken.