It also offers a cleaner look for the tradition-minded golfer. A club with offset contacts the ball later than a club without offset. This involves placing a heavier material, such as copper or tungsten, in the sole of lower-lofted irons. This helps lower the center of gravity and get the ball in the air. Progressive weighting is generally eliminated in the shorter irons to help produce a lower, flatter trajectory.
Grooves add spin and control to the ball's flight.
Backspin may decrease distance slightly but greatly enhances control. The USGA strictly controls the depth and distance between scoring lines on the clubface to ensure fairness. Loft This is the clubface angle relative to the shaft, and determines the trajectory of your shots. It varies from about 22 degrees in a 3-iron for a lower, longer trajectory to 64 degrees in a wedge for short, high shots. This is merely a cosmetic question.