Titanium Outsert System for Durable and Precise Arrow BuildsThe Altra 204 Outsert Titanium is designed to pair with the A.R.C.O.S. system and is machined from Ti5 titanium for exceptional durability. The outsert threads onto the insert and encapsulates the front of the arrow while rubber O-rings help lock it in place reduce vibration and improve concentricity for more precise setups. Machined from Ti5 titanium Designed for A.R.C.O.S. system Encapsulates leading end of arrow Rubber O-rings reduce vibration Improves concentricity and accuracy