The new Ravin Heavy Duty (HD) 500 Grain Lighted Arrows (inclusive of 100 grain field tip or broadhead) have a straightness tolerance of .001 and are the most premium arrows Ravin offers. The HD arrows have high-impact brass-threaded inserts with aluminum nock bushings and Ravin-engineered polymer nocks. The Lighted HD arrows will come in a 3 pack and utilize Lumenok Technology. - 3 Pack - 500 grain (with 100 grain field tip- not included) - Use in Ravin Crossbows only - 100% pure carbon construction - Straightness tolerance: .001