I havent needed to replace any of my blades yet because these blades stay extremly sharp even after a whole season of target practice and a big buck down with a complete pass though and buried the broadhead in the dirt, it is still extremly sharp. These things are brilliant! I would recomend to any hunter out there who needs a quality broadhead.
I switched to the G5 Strikers 3 yrs ago do to poor penetration with machanicals. I have harvested numerous deer and hogs with them.They don't leave a blood trial quite as good as a mechanical but I've had complete success with them.