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, and are compatible with the CP400 crossbow and other crossbows that utilize non-proprietary half-moon nocks. CenterPoint Archery Centerpoint CP400 Select 20" 400gr Carbon Crossbow Arrows 6pk AXCCA20TPK