Carbon Express Mayhem Fletched Carbon Crossbolt with 3-Inch Vanes, 6-Pack MULTI-LAYER CONSTRUCTION - Has an optimal size diameter and is tuned for today's high-powered crossbows to deliver exceptional down-range accuracy and penetration with a broadhead REAL STRAIGHTNESS - Sorted for straightness to +/- 0.004", creating maximum consistency shot after shot K-360 WEAVE TECHNOLOGY- Back shaft section made with a patented process that integrates a carbon weave into the outer layer of the bolt for added strength and spine consistency SPECIFICATIONS: Fletched with 3" Dragon vanes, 20" size, 420 grains, 0.348" diameter, 6 per pack