Flex - the relative amount a shaft bends during the swing, generally denoted as a rating such as L, A, R, S, or X. In general, golfers should play the most flexible and lightest ( weight ) shaft they can control.

Torque - is the amount a shaft rotates in response to a known twisting force. Expressed in degrees, torque ratings are usually obtained in static tests.

Weight - Lighter shafts mean lighter total weight and, therefore, the prospect of additional club head speed and more distance. Both the weight of the shaft and its balance point have an effect on the swing weight of the club. Shaft weights refer to raw (uncut) shafts.

Bend Point (FLEX POINT) - refers to the point on the shaft at which maximum bending occurs during the swing, usually a little less than halfway up the shaft from the tip end (bottom) of the shaft. In general, lower bend point produce more club head feel through greater tip flexibility, while high bend point tend to create a more tip-firm feel.

Balance Point - refers to the weight distribution of a shaft or assembled club. To achieve a given swing weight, a low balance point shaft requires less head weight than a mid or high balance point shaft.