Dog Bone Tri/Bi BarDog Bone Tri Bi Bar The Dog Bone Tri Bi bar is another tool utilizing the 2 3 4" balls on each end. The bar has an 18" slight bend towards the body when used correctly. This offset allows for the elbows to stay tighter to the body allowing for more muscle recruitment in our opinion, which is awesome by the way, no matter which side of the guns you are training. It can also be used for narrower neutral grip rows. The 2 3 4" balls allow for a cupping