Worth has teamed up with Monica Abbott, fastpitch's most dominating player, to bring you a complete line of training products. The 5-Tool products allow you to work on hitting for power, hitting for average, fielding, throwing and speed, taking your game to the next level. These three different weighted balls (5.5 oz., 6.25 oz., 8.5 oz.) come with drills and instructions. Set of 3.