TenPoint 16" Evo-X Centerpunch Arrows with HP Alpha Blaze Lighted Nocks. TenPoint's Evo-X 16" Centerpunch Marksman arrows have tolerances of + / -. 001 for both straightness and weight. The Alpha Blaze Lighted Nock System is a one-piece Nock/LED unit that indexes with the vanes and press fits into the arrow's HP Aluminum Bushing.
eBay