ONNIT Steel Clubs - Made from a Single Machined Piece of Steel Includes two 15lb Onnit Steel Clubs BALANCE ONE SIDED ATHLETICS: Tennis, Golf, Baseball, Volleyball, Basketball all require the use of one side of your body to a greater extent than the other. Clubs are an ideal way to help balance out the body by introducing similar motions to serving/swinging/shooting/throwing with your non-dominant hand. BUILD ROTATIONAL CORE POWER: Very few training implements offer rotational training the way that Steel Clubs can. By using the dozens of transverse plane movements offered with Steel Club training, your rotational power will increase dramatically. DEVELOP REAL WORLD STRENGTH: How many times do you find yourself needing to press three hundred pounds in a straight line off of your chest? Not very often. In the real world strength counts in your shoulders, core, and forearms,as well as with dynamic full body movements which inspired the ancient Persian wrestler and warrior elite to develop club and mace training. PERFECT FOR REHAB/PREHAB TRAINING - STAY INJURY FREE: Light Steel Clubs (5-10lbs) are particularly valuable in rehabbing joints, tendons, and small muscles, as well as preparing them for further intense workouts. The constant balancing of the weight will help your stabilizing muscles develop, helping to protect and strengthen key areas.