If you get an Arizona EZ Fletch get the one for aluminum arrows. Carbon crossbow arrows won't fit in the Arizona EZ Fletch for carbon arrows, they're too big. I use an Arizona EZ Fletch with flat nocks and don't have any problems with it. Forgot to say I use the one for straight fletch which has a 1 degree offset and am using 2" Blazer vanes. They work pretty well.