A rolling pin is a kitchen tool used to flatten and shape dough. It typically consists of a cylindrical body, often made of wood, marble, or plastic, with handles on each end. Bakers use rolling pins to create uniform thickness in dough for items like cookies, pastries, and pizza crusts. To use a rolling pin, one places a ball of dough on a floured surface and rolls the pin back and forth. This action spreads the dough evenly, making it easier to work with. Proper technique ensures that the dough does not stick, allowing for better results in baking and cooking.