Weighing 410- grains, the precision spine-indexed TenPoint Lighted Pro Elite 400 20" Carbon Crossbow Bolt .001" with Alpha-Blaze Nocks 3PK increases accuracy by 33%, delivering tighter groups while maintaining the same point-of-impact as the standard Pro Elite 400 Carbon Arrows. The 20-inch arrow features a 3" Q2i Fusion X-II Vane fletching and is equipped with a 58-grain aluminum insert, providing a 13% F.O.C. (Front-of- Center balance). The Alpha-Blaze provides bright illumination at the shot and the same point of impact as TenPoint's unlighted arrows. The Alpha-Blaze Lighted Nock contains a one-piece Nock/LED unit that is indexed with the vanes and press fits into the arrow's Aluminum Bushing. Upon firing the crossbow, the bowstring's force compresses the two pieces and activates the lighted nock. Deactivate the easy on/off Alpha-Blaze lighted nock by pulling the nock straight out until the light turns off - no tools required. The LED light of the Alpha-Blaze system lasts for app...