A golf club head as in claim 5, wherein, when the golf club head is oriented in a reference position, the first arcuate micro-grooves and the second arcuate micro-grooves form upwardly convex paths.ħ. A golf club head as in claim 1, wherein the second arcuate micro-grooves are parallel to the first arcuate micro-grooves.Ħ. A golf club head as in claim 1, wherein the second average width is greater than the first average width.ĥ. A golf club head as in claim 2, wherein the second average depth is 1.2-2 times the first average depth.Ĥ.

A golf club head as in claim 1, wherein the second average depth is greater than the first average depth.ģ.

A golf club head comprising: a heel portion a toe portion opposite the heel portion a hosel adapted to receive a shaft a striking face, the striking face including: a plurality of score lines each having an average depth no less than about 0.10 mm a first micro-groove pattern comprising a plurality of arcuate first micro-grooves, each of the first micro-grooves having a first average depth no greater than about 0.025 mm and a first average width no greater than about 0.51 mm, the first micro-grooves being substantially parallel to one another and a second micro-groove pattern comprising a plurality of arcuate second micro-grooves, each of the second micro-grooves having a second average depth no greater than about 0.025 mm and a second average width different than the first average width, the second arcuate grooves being parallel to one another, wherein the second micro-groove pattern is overlaid onto the first micro-groove pattern and a rear surface opposite the striking face.Ģ.

Golf club head with sandwich structure and method of making the sameĬonfigured face insert for golf club headġ. TREATMENT FOR THE HITTING SURFACE OF A GOLF CLUB AND A METHOD FOR APPLYING THE SAME GOLF CLUB HEAD WITH NARROW-SPACED GROOVES

Dunlop golf club head covers