This Carter Chocolate Addiction 4F Release is one of the most adjustable thumb trigger releases currently available. It will be a great addition to any archer's arsenal. It is handsome. The Carter release features three holes at the base of the trigger lever. The first hole adjusts trigger travel, while the other two are spring-loaded to affect trigger tension. There is a nearly endless variety of tension and travel setting options. The perfect thumb position setting is just a quick spin away. You will be sure to find one or more combinations that are exactly what you need. This archery trigger release is loaded with great features, such as the 360 degree rotating Adjusto Trigger Plus. It also includes an adjustable knurled knob and movable bar to help the release fit more comfortably in your hand. The release is well designed, efficient and simple to use. The cocking lever on the back closes the hook with one motion.