The Tater® Overload & Underload Training Pack is the complete overload underload training bundle. Two specialized training bats that target the three key elements of the swing: strength, barrel control, and bat whip. Built to engineer a swing that does damage at the plate. What is overload underload training Overload underload training is one of the most popular and effective methods for improving baseball and softball swings. The science is simple. Swing an overload training bat — heavier than your game bat — to build strength. Then swing an underload training bat — lighter than your game bat — to build bat speed and whip. The contrast trains the muscles to recruit faster, generate more force, and stay through the ball. Hitting coaches at all levels integrate this methodology into their programs. That includes professional, collegiate, and amateur levels, for two reasons: It promotes proper swing mechanics. It delivers real results. What's in the pack The Tater® training pack includes both bats — the heavy and the light side of the same methodology. The SST Underload Trainer and the G Force Split Grip® Overload Trainer are trusted in pro ballparks. They're also used in training facilities and on college campuses nationwide. G Force Split Grip® Overload Trainer: Typically weighs +6 to 8 ounces more than your game bat length. Example: a 32" bat at ~40 oz. SST Underload Trainer: Typically weighs 5 to 6 ounces less than your game bat length. Example: a 32" bat at ~26 oz. Who this pack is for The pack is built for serious hitters. That includes high school, college, and adult-league players who want measurable swing improvements between seasons. Hitting instructors use the pack with multiple students at a time. Travel ball programs buy multiple packs for off-season skill development. Parents of competitive players invest in the pack because it gives their kid a real training advantage. How to size the pack Choose the same size bat you currently swing as your game bat. The overload and underload weights adjust automatically. Both bats arrive sized to your specs. Younger players or hitters working on inside-pitch drills have an alternative. Try our 28" Mini Split Grip® Trainer instead. Built in Cheshire, CT Tater Baseball® hand-builds wood bats for hitters in MLB, MiLB, and Division I college programs. Our overload and underload trainers are built to the same MLB-grade standard. The pack ships together so you can start the program immediately. Browse our other Training Bats for additional training tools.