Tom Wishon 515GRT Driver Head

515GRT stands for Graduated Roll Technology, an amazing and innovative face radius design from TWGT.

The 515GRT Beta Titanium Drivers' GRT 0 Roll radius design deliver a much more consistent trajectory for shots that are hit vertically off-center. All other drivers are designed with a 12" to 14" vertical radius up and down on the surface of the face, called Vertical Roll. As driver size has increased, face height has become much taller. On drivers of >350cc size, the conventional Roll combined with the taller face means the loft at the bottom of the face is as much as 3-4 degrees LESS than the real loft of the driver. And the loft at the top of the face is 3-4 degrees MORE than the real loft of the driver.

For golfers who occasionally-to-frequently hit the ball above or below the center of the face, this wide range in loft can mean shots hit low on the face fly much lower and lose carry distance. And shots hit high on the face fly much higher and also result in a loss of distance. The 515GRT variable Roll face design delivers the SAME launch angle for shots hit low on the face as in the center of the face. And the 515GRT face design means a better launch angle for shots hit above the face center.

515GRT faces are forged in a 'wrap-around' face construction to keep all welding (plasma welding on the drivers) off the back of the face and maximize face deflection for the highest COR/spring face rating allowed under the USGA Rules of Golf. For precision, the faces are CNC machined both on the back as well as the front. TWGT computer modeled variable thickness has been proven to maximize ball speed from off-center hits for greater distance. 515 Driver face material is 10-2-3 Beta Titanium, an ideal alloy for strength + elastic modulus.

The 515GRT drivers are finished in a striking midnight navy blue see-thru finish, with satin polish on the exposed titanium surfaces.