- 2" x 2.5" Textured balls with galvanized steel bolt and safety delta clips
- Compatible with 36' or 56' Ninjalines
- Great for building forearm and grip strength
Train like a warrior! Our Ninja Balls are one of the top training devices for building forearms and grip strength on the Ninjaline hanging backyard obstacle course. Switch up your course with the hanging strap which allows for full shoulder rotation. Plus, the smaller size is perfect for more advanced users to challenge themselves! Perfect for use on our Ninjaline™ (sold separately).