Back tension release features a solid brass body and interchangeable aircraft aluminum handles. Provides precise back tension at any angle when activated. Push the thumb lever forward to draw your bow safely, release the thumb lever when you reach your anchor point, you are now ready to begin back tension and shoot. The interchangeable handles (included) are the same handles that are used for the TRU Ball Incredible release. Includes 3 interchangeable finger pieces in each package; 2 finger, 3 finger (claw) and 4 finger.