J & M Diamond Tool specializes in the design and manufacture of diamond tools. The company offers polycrystalline diamond, cubic boron nitride and natural diamond tooling. J & M Diamond products consist of diamond dressers, polycrystalline diamond and cubic boron nitride tipped inserts, diamond scribers, diamond engravers and other super-abrasive products. In addition to its regular lines, the company is constantly engaged in designing and manufacturing custom parts for many applications. J & M Diamond Tool is located in Rumford, R.I.