Pipe Bombs 3.5 Inch Cylinder Climbing Holds As Seen On American Ninja Warrior Red As seen on American Ninja Warrior. Comes in red. Color may vary from photo. Forces you to bring your A Game to every workout. 3.5 diameter, 8 height. Switch from pull-up, to chin-up, to biceps-pull without regrouping. Hang Bombs from embedded stainless steel eye bolts