Killer Instinct HYPR KE 20in Carbon Crossbow Bolts - 6 Pack - The heavy weight of the HYPR KE Crossbow Bolt delivers maximum penetration to crush big game with hard hitting kinetic energy and devastating knock-down power. Advanced Carbon Construction creates spine consistency for greater accuracy, exceptional reliability and repeat performance. Precision sorted for straightness to +/- 0.003in for maximum consistency. 20in length fletched with 3in vanes 450 grains (With 100 grain point) 0.348in Diameter, 6 per pack inserted moon nocks