Escape Climbing 4&rdquo; Wood Power Ball Pack | Durable Training Tool for Grip Strength and Conditioning | Rock Climbing and Bouldering | Premium Workout for Health and Fitness HIGH QUALITY | Specially designed ball with tough Ash wood and sturdy industrial grade hardware PRACTICAL | Easily adaptable to perform a variety of training exercises targeting different muscles CHALLENGING | Provides an ultimate upper body strength workout and improves technique HANDCRAFTED | Materials are sourced in the United States and assembled in St. Paul, Minnesota DIMENSIONS | 4 powerball that can be installed anywhere using a carabiner, chain or webbing