The Small Bombs are approximately the size of a tennis ball. They have been designed with small hands in mind such as children. This product will... • Work shoulders, grip and core in a dynamic, efficient manner. • Safe, open-hand design so tendons lay ergonomically. • Spherical shape increases forearm and grip strength, boosting endurance. • Switch from pull-up, to chin-up, to biceps-pull without regrouping. • Large (3.5") Bombs are about the size of a softball. • Hang Bombs from pull-up bars, rafters, doorways, playgrounds... • Dynamic and efficient • Safe, ergonomic design • Increase grip strength • Boost endurance • Chin or pull on the fly • Hang anywhere Pressed for time to get to the gym? Tired of fatiguing on your latest project or do you simply want your shoulders to stop aching? Well allow us to introduce the Atomik Bombs. There's a lot to be said about large muscle group and core strength training and this is what we have to throw at that challenge. The spherical/sloper shape of the Bomb makes these perfect to give you a forearm burning workout. What you can expect to do on the Bombs are lock offs, typewriter, pull ups, dead hang and most importantly the ever so important core strength workouts you need to have to climb efficiently on steep walls. There are not many training aids on the market that allow you to train "around" a hand injury, but the Bombs do. With their open hand concept design, all of your hand tendons lay ergonomically around the ball allowing you to continue to stay on top of your core and upper body strength; injured or not. Never surrender! Since you can rotate the Bombs while on them, you can switch from pull up, to chin, to biceps pull up all in one set. The diameter of each Small Bomb is 2.5 inches which is about the size of a regulation tennis ball.