The carbon express adrenaline fps is a light weight arrow series selectively engineered to maximize speed and flatten trajectory. The advanced single spine carbon construction creates exceptional spine consistency for enhanced accuracy and extreme durability. Straightness tolerances are held to a standard of .0006 With each batch also weight sorted to a tolerance of +/- 2.0 Grains. This extreme arrow delivers extreme performance from its 360° spine consistency in a .244 Standard shaft size.