The Killer Instinct Light Hypr Lite Crossbow Bolts are engineered to maximize the speed delivered by today's high powered crossbows. Advanced carbon construction creates spine consistency for greater accuracy, exceptional reliability and repeat performance. The Hypr Lite bolts are precision sorted for straightness to +/- .003" for maximum consistency and come fletched with (3) 3" vanes and inserted half moon nocks. FeaturesEngineered to maximize the speed delivered by today's high powered crossbows Advanced carbon constructionExceptional reliability and repeat performance .300" inner diameter270 grain weight (No field point)370 grain weight (with 100 grain point)