The Lazer Eye lighted nock aids the bow hunter in following the flight of an arrow and determining the location of impact. As most bow hunters know, having insight on the location of impact on the animal aids in the recovery process. It also prevents arrow loss in the event of a pass-through shot or even that unfortunate misguided shot. Weighing in at only 18.5 grains, the Lazer Eye nock is only 8 grains heavier than the standard Carbon Express nock, which equates to no difference in arrow flight or impact area up to approximately 40 yards. The Lazer Eye is activated upon release of the arrow, when the bow string compresses forward upon the arrow, ensuring the nock will illuminate on each and every shot. After recovery of the arrow, the Lazer Eye is simple to turn off by pulling the nock from the arrow of the shaft approximately 1/16". The Lazer Eye is engineered and durably constructed for repeated use, and offers up to 7 hours of illumination.