Rage Hypodermic Deep Six Replacement Shock Collars: * The Rage Hypodermic Deep Six Replacement Shock Collars prevent the blades on your Rage Hypodermic broadhead from prematurely deploying if you happen to bump your arrow or broadhead while on stand or stalking * Shock collars are designed to break upon impact and will need to be replaced after each shot * Inspect the shock collar for any damage prior to use to ensure proper function * 5 pack