Axe Speed Trainers Hitting System (High School/College/BBCOR)Unlock next-level bat speed, exit velocity, and an optimal swing plane with three Axe Speed Trainers and four unique 12-week training modules designed for both in-season and out-of-season work. Engineered by the hitting coaches and data analysts at Driveline Baseball, this system utilizes over-loaded and under-loaded Axes to holistically enhance your swing for increased power and launch angle. Used By Over 150 Top College & Pro Teams Gain 5+ MPH in exit speed, on average Increase bat speed, power and distance Improve hitting mechanics Strength training for your swing System Includes: 3 Weighted Bats (2 Overload, 1 Underload) 2.0 Driveline Training Program Book 12 Weeks Of In-Season Training 12 Week Of Out-Of-Season Training What’s New: 2.0 Driveline Training Programing|In-season, Out-of-season 2.0 Driveline Training Book Pro Flared Axe Handle Armor Alloy Ultra Overload Bats Charged Carbon Max Composite Underload Bat WHAT IT DOES: The baseball swing is a unique movement that demands unique training – unlike traditional strength training, our overload/underload system works the entire sequence of muscles involved in a swing. Driveline’s training program is fine-tuned to affect every stage of movement, delivering a better swing from start to finish. RECOMMENDED FOR:-3 BBCOR hitters. Which means all high school and college hitters. This system will also be for 7th and 8th graders who are already swinging -3 BBCOR, or getting ready to go into high school. NEW BATS INCLUDED: 1Overload, Balanced Axe Speed Trainer, 2-5/8” barrel, with red tip (+20% overload/33”/36 oz.) 1Overload, Endloaded Axe Speed Trainer, 2-5/8” barrel, with green tip (+20% overload/33”/36 oz.) 1Underload, Balanced Axe Speed Trainer, 2-5/8” barrel, with blue tip (-20% underload/33”/24 oz.) BAT FEATURES: Overload Barrel Load Bat: One-Piece Alloy|Armor Alloy Ultra Overload Handle Load Bat: One-Piece Alloy| Armor Alloy Ultra Underload Bat: One-Piece Composite| Charged Carbon Ultra 120-day warranty // Not intended for in-game use.