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* Sort your arrows for perfect consistency of spine(dynamic stiffness).
* Precisely index arrow nocks to the stiffness portion of the arrow shaft for the tightest groups.
* Check concentricity of your broadheads to an amazing +/ - .0005" for awesome hunting accuracy.
* Measure the straightness of arrows from tip to tip.
* Monitor degradation of arrow spine over the course of the season to catch problems before they show up on your score card.