These crossbow bolts are designed to withstand the high-energy demands of modern crossbows, and feature a durable carbon fiber construction. They come with 2" Blazer Vanes, come with pre-installed lighted nocks. Compatible with crossbows that utilize non-proprietary half-moon nocks. Centerpoint Premium .003 20" 400gr Carbon Crossbow Arrows w/Green LED Half Moon Lighted Nocks 3pk AXCCA203PK