I thought I had seen these at the local deer hunting show. I have not used them. You should check your state laws though, the return angle constitutes a barb in the trailing edge of the blade. Some states do not allow arrows with barbs except for bowfishing. My state is one of them.

I shoot the treesharks used them for years. Its a good bh just hard to really get scary sharp. I even use the bh sharpener that they recommend. I can say this they leave one hell of entrance an exit hole. I am in the market for one of those wheel sharpeners that fit a bench grinder that may work on these heads. Good luck