Increase power in hitting. Can be worn during warm up, in the batting cage and during batting practice to help increase bat speed and power. Can also be worn while throwing to strengthen the arm, increase velocity and help reduce injuries. Variable weight glove comes fitted with 12 ounces of weight per hand. Weight can be added to reach up to 2lbs. per hand. Extra weight packs include 2 - 2oz. weights and 2- 4oz. weights (sold seperately) Item #WTPACK