Rob is correct, but with the Quick Spins helix just isn't necessary. In fact, we've found it to be a hinderance. The Quick Spins are designed to do just that. Spin, and quickly. Fletch a regular vane w/ helical and fletch a Quick Spin straight and the QS spins faster. Spin stabilizes the arrow by creating air resistance. This resistance also slows your arrow down faster. Putting a QS on helical would do nothing but create "air brakes" on your arrow. You just don't need it with them.