Rage CrossbowX shock collars prevent the blades on your Rage CrossbowX broadhead from prematurely deploying if you happen to bump your bolt 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. These collars are compatible with Rage CrossbowX models only. Approximately 15-20 per container.