Those pins are decently durable. I've hunted 3 sesaon with a viper sight. Have a .019 on for my top to pins out to 35 yards, then have a .010 for the 40 yard pin. Those tiny ones are not much to look at in low light though, even practicing in the yard in the evening can be tough. But I've yet to break one in 3 seasons, not even the fiber.