The shield cut 3.5" X Vane is ideal for crossbows and compound bowhunting. The length and profile provide excellent steerage for any style of broadhead. The 3.5" (12.7mm) X Vane measures 0.49" (12.4mm) in height and weighs an average of 11.6 grains (751.7 mg). Like all Bohning vanes, the base of the X Vane is pre-primed for optimal adhesion.