More room for great bread Bread Steel Duo delivers fast, even heat for beautiful oven spring, crisp crusts, and more consistent baking with room to bake two loaves at once in an easy to handle design. Pairs with the Batard Baking Shell (sold separately) to do everything your Dutch oven does, without the struggle of using one. Sized for two loaves enough room to bake two loaves at once, go big with a boule, or make pizza tonight Solid steel moves heat into your dough faster than stone or ceramic  Faster preheat times ready to bake sooner than traditional baking stones, steels, and Dutch ovens, which can take 45–60 minutes to fully heat.