Founded in 1947 by John P. Walsh, Tri-Bro Tool Company ( now know as Tri-Bro Mfg. Company ) began as a tool room. Over the years the company has changed and expanded; since 1980 it has been in its present 24, 000 sq. ft. facility on 2-1/2 acres, operated by the second generation.Most of the items shown in this catalog are produced in brass. As you will see from the catalog, we have a large variety of bracelets, earrings and rings. One of our specialties is the manufacture of seamless rings and bangles in a wide variety of tailored and diamond cut styles.