Studies show that adding weight like a donut or a sleeve to the barrel of a bat not only decreases the hitter’s bat speed once the weight is removed but also creates casting in the player’s swing. The solution is to add weight to the knob of the bat rather than the barrel; thus the Hitting Knob was created.
By adding weight to the knob, it trains the batter to swing the knob of the bat, not the barrel, keeping the hitter’s hands inside the baseball or softball. This allows the barrel of the bat to get on the correct path early on and stay in the zone throughout the swing, creating a whip-like motion with the barrel.
Having the weight on the knob of the bat ultimately increases bat speed and power once the swing trainer weight is removed.