Power Swing resistance training bats help baseball and softball players build real bat speed and power without a cage, coach, or extra field time. Using adjustable resistance bands (up to 100 lbs), the patent-pending design targets the hands, wrists, forearms, and core through controlled swing reps — reinforcing mechanics and muscle memory anywhere: home, backyard, or practice. Available in Starter (1 attachment point) and Pro (2 attachment points) kits, both include a 4-week Bat Speed Accelerator training program..