Features: Durable, flexible club head for striking hard surfaces Internal shifting weight for dynamic resistance and audible feedback Sold Singularly Designed by David Weck - inventor of the Bosu® Balance Trainer, the RMT™ Club is a first-of-its-kind, highly dynamic, multi-functional training tool that teaches the principles of Rotational Movement Training™, Non-Dominant Side Training™ and functional strength training. Not only does it offer an incredible full-body workout, it educates your body to move more athletically and efficiently, unifying your body and building strength, coordination, balance and a greater range of motion RMT™ Club performs an exponential number of individual and sport specific exercises all designed to get you in peak condition, improve athleticism and enhance your strength and balance. The RMT™ Club works by combining the body's rotational movements with integrated movement patterns, skill based movements, full body movements, and high intensity movements. Yo