The Lumenock F Nock is the perfect answer for those with Deep-Six compatible arrows looking to elevate their hunting style. The Lumenok replaces the factory not on your Deep-Six style arrow with a full fledged lighted nock. Watch your arrow fly through the air like a beam of light honed in on that buck you've been chasing all morning. They are great for target shooting and hunting and come in a variety of colors to choose from. Be able to tell where you shot your animal the instant it happens by watching the light disappear as it passes through the vitals. Brighten your hunting experiences.