UMM-USA (Unique Master Models) is an American specialty scale-modeling company and online hobby retailer founded and operated by veteran modeler John Vojtech, offering an extensive selection of precision modeling tools, accessories, model kits, aftermarket detail products, decals, masks, books, and specialty supplies for serious builders. Based in Deerfield, Illinois, UMM-USA is particularly well known for developing innovative tools designed specifically to solve challenges encountered at the modeling workbench, including its popular UMM scribers, precision saws, punch-and-die sets, rivet and beading tools, sprue cutters, reamers, scribing rulers, mitre boxes, airbrush guides, PropMaster propeller jigs, and other specialized equipment. The company also imports and distributes an unusually diverse range of model kits and aftermarket products from manufacturers around the world, covering aircraft, armor, automobiles, figures, ships, resin kits, photo-etched details, conversion sets, and other specialty modeling products, including many items that can be difficult to find through mainstream hobby retailers. Vojtech brings decades of hands-on modeling experience to the company and has been active in both IPMS/USA and the Armor Modeling and Preservation Society (AMPS), helping give UMM-USA a distinctly modeler-driven approach to product development and customer service. With its combination of innovative proprietary tools, specialized imports, extensive modeling knowledge, and commitment to precision craftsmanship, UMM-USA has become a respected resource for hobbyists looking for professional-quality tools and hard-to-find products that help take scale-model projects to a higher level of accuracy and detail.