The Black Sky 2.0 Crossbow Vane is designed for crossbow bolts to stabilize them for up to 100 yards. It’s made of an ultra-stiff material that prevents vane flutter for a smooth bolt rotation and a quiet flight. The Black Sky Vane’s ultra-stiff material is durable enough to withstand the high velocities of modern crossbows. Recommended to use an instant glue and/or a fletching jig with high adhesion force.