BEST-IN-CLASS: The Thrival self-massager is the most versatile tool on the market as it can address nearly all muscle groups in your body. The Thrival tool comes in several configurations and is essential to unlock your psoas, glutes, back, neck and legs. FULLY ADJUSTABLE: Meat Grinder and Bullseye attachment head locks into the release board, with the option of choosing one of 8 positions per each side of the board for an amazing level of adjustability. This level of adjustability allows you to customize to your anatomy as well as the muscle group that you are intending to release. YOU ARE YOUR OWN THERAPIST: With the inclusion of two different attachment heads, the Standard configuration is an amazingly versatile tool. You can release and stretch nearly any major muscle group or trigger point on your body using these two attachment heads.