The invention includes a golf club iron head, correlated sets of
individually numbered golf club irons, methods of matching a golf club to
a golfer, and methods of matching a set of golf clubs to a golfer. In one
implementation, a golf club iron head includes a front striking face, a
sole, a toe, and a heel. The front striking face has a series of grooves
of a common cross sectional shape from the top to the bottom. Individual
grooves have a base and opposing sidewalls which diverge from the base and
extend outwardly in the direction of the front striking face. The
sidewalls include opposing protrusions extending into the groove proximate
the front striking face. In one implementation, the front striking face of
a golf club iron head defines a symmetrical groove cross section. The
groove base comprises a protrusion extending in the direction of the front
striking face. The base protrusion has an apex received inwardly of the
front striking face. In one implementation, a correlated set of
individually numbered golf club irons have heads progressing from a high
numbered head to a low numbered head. For at least two chosen pairs of
heads within the set, the grooves in the heads are configured to provide
decreasing golf ball spin in going from the lower numbered head to the
higher numbered head in the pair if the golf ball were hit by the faces by
identical impacts at the same loft angle.
