The Zapper 300 High Performance 3 blade arrow rest features top loading convenience and full containment of the arrow shaft for the perfect bow hunting rest. The rest delivers unconditional value and excellent performance in any bow-hunting situation. It is easy to tune for any size arrow. Arrows zip silently through the Zapper HP fins on silencing tape (4 strips included) with increased speed and no damage to the fletching. The rest cradles your arrow at all angles. The Zapper 300 High Performance has 2 support fins and 1 bottom fin, and is for arrows weighing up to 550 grains. The Zapper High Performance has a longer arrow shelf that provides more protection for the bow hand and offers a slight overdraw for archers wanting to maximize arrow speed. All Bodoodle rest components are made of 6061 aluminum and high quality materials.