Carbon bolts built to a weight between the Swift and Nitro to offer crossbow shooters another option for optimal performance. Straightness tolerance of +-.005” and weight tolerance of +-2 grains. Available in 20” or 22” lengths. Shafts are 8.5 GPI. Includes brass inserts, moon nocks, and flat nocks. Features:Carbon bolts built to a weight between the Swift and Nitro;Straightness tolerance: +-.005;Weight tolerance: +-2 gr.