Prince EXO3 Grommets

What is EXO3 Technology?
A high-tech patented racquet design utilizing large holes and String Suspension Inserts to deliver a superior effective hitting area compared to conventional racquets with the same headsize.
How Does EXO3 Technology Work?
Strings are completely liberated from restrictive, response-strangling grommets, allowing the strings to respond more freely - even at the outer edges of the string plane for balls you may hit off-center.
How does EXO3 Technology Benefit You?
A larger, more consistent hitting area- at ANY headsize - allowing all players the advantage to take their game to the next level. Now, even shots hit off center will feel and respond as through they were hit direct center.