With the development of metal tennis racquets, the old techniques of stringing wooden racquets no longer worked, and Held saw the need for a new machine. In 1970, Ektelon produced the first experimental racquetball racquet for Bud Muehleisen, a top racquetball player and early legend of the sport. Over the years, Ektelon has introduced a number of new racquetball technologies, including the first racquetball racquet made of high-strength aluminum , the first handlaid composite racquet , the first oversized aluminum racquets , and continues to develop new technologies in racquet design such as the elimination of string holes .