Atomik Climbing Holds Single XXL Cannon Bomb 9&rdquo; - As Seen On American Ninja Warrior - Advanced Training ADVANCED LEVEL TRAINING - Atomiks XXL Cannon Bomb (9) is an advanced level training tool meant to build forearm and upper body strength. Its large, spherical shape forces the hand into an open grip position, targeting forearm muscles specifically. ERGONOMICALLY DESIGNED - Open-hand design allows tendons to lay ergonomically providing you with excellent quality training, increasing forearm stamina and strength, and boosting endurance. VERSATILITY - This 9 Bomb can be used in a variety of different style workouts. Perfect for Ninja Warrior, parkour, gymnastic, bouldering, and rock climbing athletes. Allows full shoulder rotation (if using one per hand). SIMPLE TO USE - An excellent addition to your workout routine. Your sloper and core training will be taken to a whole new level. Easy to setup and use, and its insanely fun to be on. 30-DAY RETURN POLICY - all of our products have our 30-day return policy. This means you can experience your XXL 9 inch power training bomb completely risk-free.