Diamond Cutting Diamond Cutting Tools Continental D.I.A has been producing superior quality diamond cutting tools for the stone industry. Since 1993, Continental D.I.A. Diamond Products has been producing superior quality diamond tools for the stone industry. With its introduction in 1998, our Terminator line of diamond tooling serves as an ongoing testament to our success. The Terminator name has become synonymous with industry ideals such as quality, performance, and value. From bridge saw blades to CNC tooling, our mission has always been to offer our customers innovative, cost-saving products combined with the knowledgeable and professional support they expect.