A rolling pin is a kitchen tool used to flatten and shape dough. Typically made of wood, marble, or plastic, it consists of a cylindrical body with handles on each end. Bakers use rolling pins to create uniform thickness in dough for items like cookies, pie crusts, and pasta. There are different types of rolling pins, including the traditional tapered style and the more modern straight style. Some rolling pins come with adjustable rings to ensure consistent thickness. This simple yet effective tool is essential for both amateur and professional bakers alike.