The Nightmare Xtreme, 100% pure carbon bolt, is designed for one thing, Hunt and Hunt Hard!We have spent years testing to create a bolt with maximum penetration, supreme accuracy, and unmatched toughness. This bolt features a balance of speed and penetration. It is the perfect crossbow bolt for all hunting situations.Constructed of 100% Carbon which gives the Nightmare Xtreme unmatched quality and straightness shot after shot. Straightness Tolerance: +/- .003" or better You have an option of 20" or 22" at checkout Weight Tolerance: +/- 2 gr Inserts Included and installed Red Half Moon Nocks Included 20 Bolts 284gr - 22" Bolts 301gr Durable Rally Fletching 1 DOZEN