Not to mention the only time I have heard of them failing is when the O-ring was missing. That's just a simple matter of checking your equipment before going into the woods. People say if you're not sure don't use them. But if that were true poeple would still be shooting recurves only because compound bows were different and poeple didn't know if they could trust them. How were you sure the broadheads you're currently using would kill a deer until you actually killed a deer with them?