The versatile Wall Ball is grippable and padded for added resistance to develop functional strength, improve muscle stability, and increase explosive power. The Wall Ball can also be used as a base for an extra challenge to coordination. Boost power in your thighs, glutes, and hamstrings, with leg lifts and curls Build abdominal and lower back muscles with rollouts, crawls, and knees to chest movements Strengthen chest, shoulders, back and arms with push ups, crawls, and pike ups Measures approx. 15 in diameter. Choose between 10 lbs., 16 lbs., and 20 lbs. for extra levels of resistance and strength.