Indiana Metal Craft Ball Marker Putter Stud with Personalization GPS901P IMC-Retail Size 1" diameter Nickel plated 1" deep putter stud holds removable 0.75" permanently laser engraved die struck nickel silver ball marker. Packaged in individual box. Permanently laser engraved on USA made emblems and assembled with imported components by Indiana Metal Craft. Ball Marker Putter Stud