of the shaft is less likely to occur and it is probable that the golfer will strike the ball in such a manner that the striking face 13 of the club head will be 34 open 34 in relation to the intended line of flight of the golf ball and the ball will slice to the right when struck by a right handed golfer a different golfer or a different degree of stiffness or flexibility in the shaft may produce the square relationship illustrated in fig3 b where the ball striking face 13 is essentially perpendicular to the intended line of flight of the golf ball in another circumstance where a 34 whippy 34 or highly flexible shaft is used it might be found that upon impact of the club head with the golf ball the club striking face 13 assumes a 34 closed 34 condition in relation to the intended line of flight of the ball with the result that the ball is apt to hook to the left when struck by a right handed golfer it will thus be seen that the degree of flexibility and the nature of that flexibility is extremely important in the way in which a ball will 34 fly 34 when struck by the club head flexure in a golf shaft is not measured merely by the degree of flexure measured from one end of the golf shaft to the other this is of course an important parameter for consideration but also and perhaps even more important is a determination of where along its length will a golf club shaft flex and to what degree to illustrate this parameter reference is made to fig5 a through 5c where different flexure patterns of different shafts of essentially the.