Illuminate your high performance TenPoint or EVO-X crossbow arrows with the TenPoint Alpha-Brite Lighted Nock System. Designed for arrows with a .297, .300, or .305 shaft inside diameter, these nocks add shot-activated illumination to help you see the arrow's flight path and find it afterwards. The 3-piece Alpha-Brite nock begins with a Nock-Receiver insert with a six-sided interior cavity designed to accept a combined LED unit and translucent pegged Alpha-Brite Nock. These special nocks also feature the deep groove of the TenPoint Alpha-Nock for use on its 2019 and newer crossbows. 3 pack comes with 3 translucent Alpha-Nocks, 3 LED Units, 3 Nock Receivers, Nock Receiver and Alignment tool, and a refletching tool. Manufacturer model #: HEA-358.3. Illuminated nocks for high performance TenPoint or EVO-X crossbow arrows Special Alpha-Brite nocks - work with 2019 and newer TenPoint crossbows Designed for arrows with a .297, .300, or .305 shaft inside diameter 3-piece nock system - Nock-Receiver insert, LED unit, and translucent pegged Alpha-Brite Nock 3 translucent Alpha-Nocks, 3 LED Units, 3 Nock Receivers, Nock Receiver and Alignment tool, and a refletching tool NOTE: Nock Receiver must be glued into the nock-end of the arrow and indexed with the vanes.