String tension is one of the most important factors in the performance of your equipment. Even the best racquet will play poorly if not strung well. It used to be difficult to estimate tension and monitor tension loss over time� until now! The Stringmeter eliminates the guessing, plucking and taping of strings to measure tension. In minutes it gives easy and accurate readings of string tension and tension loss. It lets you know if your racquet was strung to your preferred tension, and lets you know when it's time to restring (usually five to ten pounds of tension loss). Measure string tension. Measure tension in pounds and kilograms. Measure main string tension during the stringing process. Measures string size. Know your string tension for better play!