Features: – Dual Spine Weight Forward Technology- Patented 2 spine arrow shaft with heavier front for tighter groups & better penetration plus reduces oscillation by 50% & TWICE the ACCURACY. – BuffTuff- Patented outer layer construction on the front 2/3 that provides the world’s toughest and quietest carbon arrow finish plus makes it easier to remove from targets. – Laser Match Set- Pack sets are sorted & matched by spine and weight for best-in-class consistency. Spine sorting tolerance +/- .0025 & Weight sorting tolerance +/- 1.0 grains – +/- .003 Real Straightness- Laser checked for straightness to remarkable 1/10000 of an inch our straightness standards are set as a max not an average like competitors. – Universal Nock System- includes inserted moon nocks plus C-Nocks compatible with crossbows that use Capture or Alpha Nocks. – 3 Fusion Vanes – The D-Stroyer 380 is the lightest and fastest bolt in the Carbon Express lineup. It provides Dual Spine Weight Forward Technology for ultimate down-range accuracy plus BuffTuff exterior on the front 2/3rds that adds superior strength and consistency. Maximize the most speed and accuracy out of your crossbow with the D-Stroyer 380 Crossbolt.