If you want to WIN, you need to use SPIN. The RPM Rough tennis string gives you great spin. You can actually feel the string texture. And the texture gives every stroke more bite. No wonder this string is used by the world's best players, including Félix Auger-Aliassime. Made in France. Your racquet's strings are its driving force. In fact, they account for half its performance. In other words, you need to choose carefully. We invented tennis strings in 1875. Since then, we've been coming up with innovations to help you play your best game and have ever more fun on the court. The octagonal structure and rough high-density copolyester texture sets the ball whirling, taking your spin to a new level. The copolyester in the RPM range makes the monofilaments especially durable. This is perfect for players who hit the ball hard. The embossed logo further reduces friction to make the strings last longer. The stiff RPM range strings give you control so you can hit precise shots that stay on the court.