Founded in 1909 as a manufacturer of steel tape rules, TJM Design Corporation (formerly Tajima Tool Corporation) is Japan’s largest manufacturer of hand tools and owner of the Tajima brand of professional-grade tools, with global production facilities. A privately owned company, Tajima continues a tradition of excellence in the manufacturing of its tools. Excellence in design, selection of materials, and in the production and quality control processes. The result is a line of tools that offers exceptional features, and function at a high level of quality rarely seen in today’s industry. We stock a couple of Tajima’s highly-rated mastic sealant caulking guns.