Many french ovens come with plastic knobs on the top of the lid - while phenolic plastic is great for safe handling on the cooktop, it is can cause a problem if you regularly use your french oven in the oven. Le Creuset's Phenolic Knobs are oven safe to 375 degrees - but swapping it out with a stainless steel knob is a breeze and you won't have to worry about it melting in the oven even at higher temperatures!