These are Grass Fed beef marrow bones that are cut lengthwise, exposing a long section of marrow, often used for making stock or as a culinary delicacy. The bones can be added to a pot with vegetables (like carrots, celery, and onions) and water to create a rich, flavorful stock. The marrow itself can be eaten as a rich and flavorful delicacy, often roasted or spread on toast. Marrow bones are a good source of collagen and gelatin, which are beneficial for joint health and skin