Bohning Frontier Fletching Clamp Insert Kit Multi. 0 Crossbow Vane is designed specifically for crossbow bolts to stabilize them for up to 100 yards. This vane is a lower profile than the 2.0 and is shield cut. 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. Features of Bohning Black Sky Vane Shield Cut: 3.0? (76.2mm) in length 0.48? (12.1mm) in height Average 8.5 grains (551 mg) weight Pre-primed for optimal adhesion. Package Contents: Bohning Black Sky Vane Shield Cut Bohning 1346KIT: Frontier Fletching Clamp Insert Kit Multi