Training for all Levels - Atomik’s sets of 2 x 3.5" spherical shaped climbing balls are great training tools meant to develop forearm muscles and strength at any level. With 4 sizes available, you are bound to find one that fits your current skill level Carefully Designed - The spherical shape forces the hand into a more open-handed pinch. They range from 2.5” for beginners and little ones, to 6” for the more advanced athletes Versatility - These 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 Easy to Use - An excellent addition to your workout routine. Switch between pull-ups and chin-ups without ever letting go. Easy to setup and use, and it’s 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 climbing bombs completely risk-free Atomik Climbing Holds Balls: Want to train like the American Ninja Warriors? Are you looking for a fun way to work on your forearms, improve your climbing strength, stamina, and endurance? How about a quality product that will challenge you, inspire you to train harder, and take your workouts to the next level? Look no further - Atomik’s climbing balls are great beginner-advanced level training tools meant to build forearm and upper body strength. The 2.5” small balls are perfectly sized for little hands, making them good training devices for younger or beginner rock climbing athletes. These 3.5" balls are a good beginner level workout device. They're easier to hold on to than the larger spherical balls, so they're excellent for athletes just beginning to build forearm strength. Their shape and ability to rotate make them easier on your tendons and shoulders. The 4.5" pull-up balls are a slightly more challenging version of the 3.5" balls. Their size forces your hand open more, resulting in greater forearm engagement and faster development of the forearm muscles. At 6" in diameter, the XL Balls require sufficient forearm strength, making them more functional for advanced level training. These balls are versatile training tools and can be used in a variety of different style workouts. Perfect for Ninja Warrior, Parkour, gymnastics, and rock climbing athletes. Risk-Free! Not completely satisfied? All of our products have our 30-day return policy. Experience your new spherical bombs risk-free.