Its as the name implies..........the bevel for the blade edge is on one side only.
IIRC right bevel is for right wing fletch, left for left wing.
This way they spin together and supposedly the cut in tissue has rotation as well.
2 blade heads. Instead of a slit the cut reportedly in a bit of an S shape?
I got some tool steel Cutthroat 125's to try ($20 each) and got em pretty sharp.
Did not shoot any deer so will keen em up again and try in a couple months LOL
