Look to the GAMMA TNT2 Tennis String for enhanced playability, durability and control for all playing styles. With increased dynamic elasticity and resiliency, the ball stays on the string longer for improved control and accuracy with elevated speed and power. Design Details TNT2 Technology increases dynamic elasticity (energy stored) and dynamic resiliency (energy returned to the ball) for improved control and accuracy with enhanced speed and power Shock reduction minimizes impact on your arm and elbow #1 all-around string for power