Shaft manufacturers employ various methods of measuring shaft flex, and some shaft models vary in flex considerably from shaft to shaft. The Golf Shaft Deflection Board gives the serious clubfitter a tool to compare a shaft’s exact flexibility to industry standards or to other shafts.
By mounting the shaft on the board and installing the 7 lb. weight on the tip, the flex can be read from the color coded line where the tip is positioned. Color coding identifies X, S, R, A and L flexes. In addition, the curvature of different shafts can be compared to establish where flex is concentrated: at the tip, in the middle, or toward the butt end. Not recommended for shafts 75 grams and under.