Founded in 1889 as a drilling exploration company, Hoffman Diamond Products is a privately held, American-owned and operated manufacturer of metal-bonded diamond tooling. Its history in drilling led it into diamond-bit manufacturing, and it now supplies tooling to mining, construction, and industrial ceramics markets, including mining exploration as the last remaining American-owned manufacturer of diamond bits for that industry.
Diamond Products LimitedDiamond Products is one of the largest diamond tool and equipment manufacturers in the United States, supplying the construction industry for more than 50 years. The company emphasizes a broad selection of diamond tools and equipment, including customized products, supported by a seasoned field sales organization.ELYRIA, OH
Hewlett ManufacturingFor more than 60 years, Hewlett Manufacturing of Linesville, Pennsylvania, has made diamond-coated sharpening tools, including the original oval diamond steel perfected by founder Harlan D. Hewlett. The family business grew from OEM manufacturing into the JewelStik® brand and supplies sharpening tools to established knife companies while producing its products in the USA for home, shop, and professional use.LINESVILLE, PA
Highland Carbide Tool Company, IncHighland Carbide Tool Company, Inc. is a family-owned carbide tooling manufacturer that has been in business since 1946. It produces specialty tooling and cutting solutions for mills, foundries, and manufacturing facilities, drawing on more than 70 years of experience in tool production. The company combines automated manufacturing technology with the craft skills of its machinists to develop custom tools for customer applications.IRWIN, PA
National Diamond Tool and CoatingNational Diamond Tool and Coating is a family-owned Westlake, Ohio manufacturer of custom PCD and CBN tooling, with diamond-tipped tools made in the USA at its 20,000-square-foot facility. Founded in 1994 by Thomas Abersold, the company remains under family leadership, with his son Bill serving as president since 2017. Alongside custom manufacturing, it repairs and retips tools from other manufacturers and provides diamond coating services for demanding machining applications.WESTLAKE, OH