TKO Sport's Tri-Grip Urethane Hex Dumbbell handles are unique and have been engineered for performance and comfort. Most hex dumbbells feature a chrome handle that is either round or contoured in shape. While these handles are comfortable and serve their purpose, the patented Tri-Grip handle by TKO is the most advanced anatomically correct gripping system ever. This tri-cornered handle was designed to mimic the bones of the hand allowing for a natural grip no matter what size your hands are. This fully knurled triangular shape gives users greater control of the dumbbell while exercising and helps eliminate pain and fatigue in the hands that can accompany some dumbbell exercises.