Designed for the ultimate combination of speed, accuracy, and penetration. Features built in Weight Forward technology for improved broadhead accuracy and K-360 Weave technology for added strength and spine consistency. Straightness tolerance of +-.0035â?쳌, weight tolerance of +-1.0 grains. Available in sizes 250 (.410â?쳌 spine, 8.9 GPI) and 350 (.334â?쳌 spine, 9.8 GPI). Includes BullDog Nock Collars, Launchpad nocks, and inserts. All sizes use 19/64â?쳌 points.