The heavy weight of the KillerTech 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 for maximum consistency. Advanced Carbon Construction 430 grains 20" length Precision sorted for straightness to +/- 0.003" 3" vanes shield cut 0.346" outer diameter