Wilson Pro Staff 97 LS Tennis Racquet The new Pro Staff with Spin Effect Technology This light weight and more maneuverable Pro Staff 97LS packs more power and delivers precision spin Perfect for players looking to attack the competition Spin Effect Technology increases ball RPM without players changing their swing, the net seems lower and the court feels longer on all your shots allowing for fewer errors, more power and a bigger sweetspot with a softer string bed This racquet comes unstrung and without a cover