The EXO3 pre-loaded blade angle is quick to deploy, and the head design features built-in stops for both closed and open positions, preventing arrow damage. The EXO broadheads are stronger, straighter and superior. The curved blades cut faster and penetrate longer. Quiet flight and field-tip accurate out to longer distances. The EXO expandable line is super accurate, consistent and devastating when putting critters in your freezer. A patent pending design built by archers and hunters requiring no o-rings or bands for use.