Practice baseballs, also known as training balls or cage balls, are used for baseball practice and drills. They are often made of leather or synthetic materials, and are designed to be durable enough for repetitive use. Some practice baseballs have raised seams to help pitchers improve their grip and throwing accuracy, while others have a softer, softer center to reduce the risk of injury when hitting. Practice baseballs can be used for batting practice, fielding drills, and pitching practice. They are also used in batting cages, bullpens and training facilities. Practice baseballs are also available in different weight, size and level of hardness for different age group and skill level.