Excalibur FireBolt Illuminated 20in Carbon Crossbow Bolt - 3 Pack - Excalibur’s exclusive FireBolt Carbon Arrows are designed specifically for the EXO-Traditional series crossbows to deliver optimum speed and accuracy. Equipped with ultra-bright flat-back Lumenoks 263 grain arrow weight 3-Pack 20in Arrow length Feature 4-inch offset vanes. A heavier front insert increases front-of-center weight for unparalleled accuracy.