The modern game is all about spin and Wilson understands spin like no other brand. The Steam Tennis Racquets are engineered for hard-hitting players who use spin to curve the ball’s flight and control the game. Their revolutionary Spin Effect Technology is the first racquet system that actually INCREASES the RPM of every shot by maximizing spin-enhancing string snapback during ball contact. -The exclusive string system gives 3.3 times more string movement with 69% faster snapback for up to 10% more spin. -The first racket that adds spin to every shot due to Wilson’s patent-pending Spin Technology.