This is a wrist exerciser that can strengthen the muscles of the wrists, fingers, and arms. Wrist curls and reverse wrist curls aim to improve grip strength, which is fundamental to sports, and allow for efficient training. The intensity can be adjusted, so you can train according to your current condition. It's compact and lightweight, making it a convenient size to carry around. It's ideal for home use, as well as at the gym or office. It is recommended to start with a light weight and gradually increase it. Once you get used to it, do 3 sets of 10 repetitions at a weight that is challenging. Do this every other day. Although there are individual differences, you should be able to increase the intensity in about a month, and you should see a significant change in three months. Pitch speed changes with grip strength. The way breaking balls curve also changes considerably. While the hips and lower body are important for batting, grip strength and arm strength come first. Do your best! Thank you. #GreatSportsGoods