The Total Control Sports Weighted Baseball Training Aid Balls - 3 Pack were designed specifically to develop maximum strength and drive through the hitting zone. They can be used for both fast pitch softball and baseball and used for both front and side toss. With its weighted design, start out slowly with 3 to 6 solid hits and increase to maximum of 18 to 24 in one hitting session. Designed to develop maximum strength and drive through the hitting zoneCan be used for both fast pitch softball and baseball and used for both front and side toss The optimum use is when the front toss method is usedWith its weighted design, start out slowly with 3 to 6 solid hits and increase to maximum of 18 to 24 in one hitting sessionDesigned to develop maximum strength and drive through the hitting zoneLong lasting and washable soft toss without net safe for all bats no glove required