Hunting accuracy for shooter confidence is the cornerstone of Easton 6.5 arrows. The 6.5 uses proprietary Acu-CarbonUniform Spine process. Acu-Carbon is a continuous-fed, single-die manufacturing method that results in the most reliable tolerances and eliminates the need for the spine-alignment and weight sorting. Easton's Acu-Carbon production line produces the most consistent spine and weight from dozen to dozen and lot to lot-year in and year out. This benefits the bowhunter with truer flight and pinpoint accuracy in the field.