TenPoint Alpha Brite Lighted Nock System 3 pk. The Nock Receiver is glued into the nock-end of the arrow and indexed with the vanes;Six-sided interior cavity designed to accept a combined LED unit and translucent pegged Alpha-Brite Nock;Package includes translucent Alpha-Nocks, LED Units, Nock Receivers (for arrows with shaft sizes .297, .300, .305 I.D), a Nock Receiver and Alignment tool, and a refletching tool
