Rage Legacy Shock Collars prevent the blades on your Rage Broadhead from accidently deploying if you happen to bump your arrow or broadhead while on stand or stalking.  The Legacy Shock Collars fit any 100 grain Rage Broadhead and are designed to be used in conjunction with the existing O-ring for optimal blade retention.  Legacy Shock Collars break on impact so they will need to be replaced after every shot.  Inspect the Legacy Shock Collar for damage prior to use to ensure proper function.  Legacy Shock Collar use is optional.