[1] The R7 Quad was one of the first drivers to feature Movable Weight Technology, which enabled the golfer to rearrange four differently weighted screws in the driver's head in order to alter the flight of the ball according to a player's personal preferences.
For the average golfer, this meant being able to use the clubs different weight settings in order to correct a hook or a slice.
[2] Under the rules of golf, this type of equipment adjustability is legal, provided that no changes are made during play.
With the success of the R7 Quad, some other companies have sought to bring customizable products to the market, while others have produced clubs that are pre-weighted for the same corrective ball-flight.
A Tour Preferred version of the R7 Quad, 425, 460, and Superquad, supplied with a number of additional differently weighted cartridges for even more placement variations, non OEM shafts using models directly from the top shaft manufacturers such as Matrix, Fujikura, and Mitsubishi Rayon, instead of the 'co-engineered' models, and 1-degree open face, is (or was) also available.