Very confusing, as the archery shop evidently gave me instructions for New Archery Quik Spins, with the lot of Blazer vanes they gave me.

On Blazer site, they recommend helical or 2-3 degrees of offset.

MY EZ Fletch has 8 degree helical, 4 degree offset or 1 degree offset options. The NAP Quick Spins appear to have a thickened trailing edge that would not fit in an EZ fletch arm's narrow slot,but the Blazer slides right in. My EZ Fletch was originally ordered with 8 degree right helical for my recurve bow. So, I've ordered the 4 degree offset for these Blazers, as it seemed the closest to their recommendation.