SONARTEC, the American brand of Royal Collection loved by a large number of PGA players, has been reborn as a parts-only brand. Its concept is The Supreme Forged. A lineup of SONARTEC products, which attaches importance to a solid feel that a large number of golfers prefer, has been produced through a careful forging process. SONARTEC introduces a world of custom-made clubs to users who would like to enjoy the customization of clubs or who have not been satisfied with conventional products.