The GAMMA® String Tension Tester lets you know when it's time to restring your racquet. The tester measures relative tension loss of strings over time and its modern ergonomic design is easy to operate with one hand. Make sure your racquet is ready before every set with the GAMMA® String Tension Tester. FEATURES: The GAMMA® String Tension Tester lets you know when it's time to restring Measures relative tension loss of strings over time. Modern ergonomic design is easy to operate with one hand Larger scale, quickly gives readings with more accuracy than competitive testers GAMMA