The Lumenok is the most popular lighted nock on the market. The simplicity of its design and operation make it the lighted arrow nock of choice for many of today's most progressive archers and professional bowhunters. The Lumenok adds only a few grains of weight to your arrow. No magnets are required for Lumenok function. Minimal arrow shaftend preparation and fitting are required for proper Lumenok function. The Lumenok will work with any aluminum or carbon arrow that use standard ICS components such as Gold Tip, PSE Radial X Weave, Carbon Tech, Victory, Carbon Impact, Carbon Express, Easton and Beman. For small diameter carbons from Trophy Ridge and Easton, the Lumenok X is available.