is designed in conjunction with a top to bottom difference in stiffness thus the golf club head has enhanced flexibility and selectively increased stiffness for improved performance and feel application_number US 27358402 A description with reference now to the illustrative drawings and particularly to fig1 5 there is shown an iron type golf club head 10 having a cast metal body with a top edge 12 and a bottom edge 14 at its front wall 16 a scoreline pattern 18 at a front striking face 20 of the front wall may have the form of u shaped grooves or any other groove shape desired to obtain a preferred spin rate for a golf ball not shown upon impact with the striking face the striking face has a length l f measured from a point of intersection of a shaft axis 22 with a plane supporting the club head to the widest point at the club head 39 s toe end 24 the present invention can be embodied in long and mid irons e g 1 4 and 5 7 having loft angles u03b8 ranging from about 17 u00b0 to about 38 u00b0 as well as in short irons e g 8 9 having loft angles u03b8 ranging to about 45 u00b0 and also in wedges having loft angles up to about 50 u00b0 a sole 26 may have one or more bounce.