The Lumenok X is activated upon the shot to allow archers to follow the path of their arrow. This model Lumenok provides up to 40 Hours of Illumination and can be seen from great distances. No magnets required for activation. This Lumenok is made using a A Nock from Bohning. Lumenok X Fits: Easton: Axis, Traditional Only, AC Superslim Beman: MFX, Nightfall Gold Tip: Kinetic Black Eagle: Rampage Victory: RIP