I have a arizona e-z fletch...it has a 4 degree helical. I use the 4 inch vanes. I don't use carbon arrows myself because all the aluminum arrows that I already have, plus married so she said to use those up first, then maybe she would let me buy carbon.(yeah right...she holds all the money) But out at camp if someone has the carbon arrows and they need some repair or flecthing, I tried it and it worked ok. I have tried it on a multitude of arrows sizes. I really like the notch pacement on the base. It is adjustable to work on alot of different notch placement angles. It can fletch feathers as well as plastic on a variety of feather length... This is just my thought on it. I really like it. its really easy to use....