STAN Onnex releases are designed with legacy features archers must have built into a complete shooting system Each Onnex handle will allow for the shooter to change between one of the three handle types thumb button, back tension, & resistance seamlessly while maintaining anchor point & peep height Heavy Metal construction adds weight and forgiveness Open hook design for consistent and accurate lateral nock travel Crisp breaking activation with both independent trigger travel and trigger tension adjustments Loop retainer allows connection to your bow with the single open hook, while keeping your release connected Available in multiple sizes to comfortably fit any archers hands Built on a modular body the release may be shot as a two finger, three finger, or four finger all with one button head screw adjustment with a 5/64" Allen key Includes two length barrel posts one long and one short as well as two barrel sizes a small and large for perfect hand fit STAN Trainer Lock feature allows for practice of trigger activation without actually firing