Gamma String Tension Calibrator Features_Programmable Drills Mixing up the ball rate

Mixing up the ball rate interval simulates match play and keeps players on their toes

One side has a slip-resistance grip pattern molded into the surface

the Rainbow Spots will stay in place when hit by a ball or run over

savable drills

Wilson Sensation 16 tennis string features dual wrap Xycro Micro Fibers with a nylon composite coating to reduce vibration as compared to traditional synthetic gut

Gamma String Tension Calibrator Features_Programmable Drills Mixing up the ball rateKeep your racquets in tip top shape by making sure your machine is accurate with Gamma's Tension Calibrator. This tool is a must for making sure your machines are accurate.