Designed with a smaller diameter to deliver improved penetration and reduced wind drift while maintaining broadhead accuracy. Stiffer front end of the arrow repositions arrow flex to the Red Zone and reduces oscillation on the front end to make broadheads shoot more consistently. Straightness tolerance of +-.0025 Inch, Weight tolerance +-1 gr. Available in sizes 250 (.403 Inch spine, 8.3 GPI) and 350 (.335 Inch spine, 9.4 GPI). Includes nocks, BullDog nock collars, and inserts.