TenPoint Red Lighted Crossbow Nock System Omni-Brite 2.0 W/ Optional Moon Nock (3pk) 

The three-piece Omni-Brite 2.0 Lighted Nock System begins with a nock receiver insert with a six-sided interior cavity designed to accept a combined LED unit and transparent pegged Omni-Brite 2.0 nock. The nock receiver glues into the nock end of the arrow and must be indexed or aligned with the vanes. Package includes translucent Omni-Nocks, LED Units, Nock Receivers for arrows with shaft sizes .297, .300, .306 I.D, a nock receiver and alignment tool, and a refletching tool.

Red
Three-piece Omni-Brite 2.0 Lighted Nock System

The nock receiver glues into the nock end of the arrow

Nock receiver must be indexed or aligned with the vanes

Manufacturer: TenPoint Crossbow Technologies

Model: HEA-368.3