The 1 Armor's weight is concentrated in one place, which biases the Layer's center of gravity and increases the Beyblade's attack power.
— Official Description
Takara Tomy's 1 is an Armor with its weight focused at a single point. This asymmetrical design creates an imbalanced weight distribution, which in theory increases Attack Potential. The imbalanced design of 1 is intended to work in tandem with the Xcalibur DB Core and Xiphoid BU Blade.