With a legacy dating back to 1903, SOSS continues to define the invisible-hinge industry — offering genuine quality and timeless craftsmanship. Founded by Joseph Soss more than a century ago, the company pioneered the concealed hinge and advanced manufacturing, including its patented die-casting machine, to ensure rigorous quality control, continuous testing, and the selection of superior materials for reliable form, fit, and function.
Superior-quality construction engineered for heavy-duty use — precision-machined components and tight tolerances deliver smooth, quiet operation, consistent fit, and long-lasting performance even in the most demanding applications.
Preserves seamless door-and-frame aesthetics, making it ideal for high-end residential and architectural projects, and is offered in an extensive range of sizes, styles and finishes to meet any design or installation requirement.
Concealed, tamper-resistant design enhances security and aesthetics, with no exposed hinge pins or fasteners to compromise appearance or allow unauthorized removal, while requiring minimal maintenance and fitting easily into both new construction and retrofit projects.
UL-listed models available — safety-certified and fire-rated for code compliance, simplifying specification and providing verified protection for occupants and property.