cannonball 23 cm. The cannonball hold is advanced difficulty level hold. it is suitable for the for the Experienced trainee. This hold offer many different ways that you can use it such as, you can hang a couple of different holds on a bar or in your nearest park and transfer from one hold to another, and also you can jump from the cannonball or jump to the cannonball which is very challenging. The cannonball hold can be used as a pulling tool. you can hang it over a bar and do many different pull ups variations like pull ups, eccentric pull ups and more. This hold can be used as a dead hang tool as well. You can hang with straight arms on the hold do sets of dead hang . this hold will help you with your pulling power and it will help you develop great grip strength, develop your lock offs power and also with your eye hand coordination.