The CX Lazer Eye lighted nock aids the bow hunter in following the flight on an arrow and determining the location of impact on an animal. As most bow hunters know, having insight on the location of impact on the animal will certainly aid in the recovery process. The added benefit is that it also helps prevent arrow loss in the event of a pass-through shot or even that unfortunate miss guided shot. Weighing only 18.5 grains, the CX Lazer Eye lighted nock is only 10 grains more 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 which ensures the nock will illuminate on each and every shot. After recovery of the arrow, the Lazer Eye is simple to turn off by slightly pulling the nock from the arrow of the shaft approximately 1/16ö. The CX Lazer Eye lighted nock can be used repeatedly due to its durable construction and engineered design while offering up to 7 hours of illumination.