Allegion's Commercial Family of Brands

WHY SOSS

Great doors hinge on SOSS®

Since 1903, SOSS has been transforming the way doors look and function with our revolutionary invisible hinges. These hinges not only enhance the aesthetic appeal of your doors, but also improve security. You’ll appreciate the seamless functionality and clean lines that SOSS hinges bring to your projects. Choose SOSS to achieve a sophisticated, elegant look that complements any space.

SOSS invisible hinges combine style and reliability. Designed to seamlessly fit any architectural style, they ensure your doors enhance your design vision without sacrificing security. Trust SOSS for quality and innovation that elevate your projects.

Strength

Built from premium materials and precision-crafted, our hinges deliver unmatched strength and resilience and are rigorously tested to ensure robust durability and reliable functionality.

Style

SOSS Invisible hinges help to preserve design intent by staying out of sight while delivering precise fit, smooth movement, and a refined finish.

Security

Concealed, tamper‑resistant hinge solutions engineered to help prevent unauthorized access, reinforce door integrity, and maintain reliable operation under stress.

Our Story

For more than 120 years, SOSS has pioneered concealed hinge technology, driven by the belief that hardware should enhance—never compete with—design. Combining patented engineering, durable materials, and exacting craftsmanship, SOSS delivers invisible hinges that provide smooth operation, security, and low maintenance across demanding architectural, commercial, and institutional projects. Backed by technical support, custom solutions, and a legacy of innovation, SOSS continues to help designers, fabricators, and installers achieve clean aesthetics and reliable performance that stand the test of time.

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Used with permission of the Western Pennsylvania Conservancy

Our Offering

SOSS offers an extensive selection of concealed hinge sizes and concealed hinge solutions for all door types and sizes. In addition to our classic invisible hinge line we offer closer hinges, power transfer hinges, wide throw hinges, and extra heavy duty hinges that will always remain invisible. Finish the overall look of your doors with our magnetic door holder and stop holds or try our barrel hinges on your next woodworking project.

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Articles & Insights

View our Articles & Insights section for design inspiration, concealed hardware solutions, technical guidance, commercial application expertise, and industry insights to help you make informed decisions and stay ahead of emerging trends.

Design Inspiration

Concealed Solutions

Technical Guidance

Commercial Applications

Industry Insights

Featured News: How to Make A Secret Door

Ever wondered how to create a hidden doorway straight out of a mystery novel? This guide walks you through the process of designing and building a secret door, from choosing the right style and materials to installing concealed hardware for a seamless finish. Whether you're hiding a pantry, home office, safe room, or simply adding a one-of-a-kind feature to your home, you'll find practical tips and inspiration to bring your vision to life. If you've ever dreamed of adding a little intrigue to your space, this is the perfect place to start.

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Solutions Made Easy

Solutions by Market

Find the right solutions for your higher education, multifamily, government, commercial real estate and office/retail projects.

Solutions by Role

Are you an architect, interior designer, locksmith, authorized distributor, or builder? We have resources for concealed and invisible hinges.

Solutions by Requirement

Explore solutions for fire-rated, behavioral health, electrified, corrosion-resistant and hidden & concealed design applications.

Solutions by Family

Learn more about our most popular series, see 3D models in action, view finish options and access valuable product resources.

ALL IN ONE. ALLEGION.

As part of Allegion’s family of pioneering brands, SOSS benefits from the strength, efficiencies, resources, and integration from a global power. In turn, we pass those advantages on to you.

Allegion helps keep people safe and secure where they live, work and visit. With more than 30 brands sold worldwide, we specialize in security around the doorway and beyond. It’s the power of one.

Learn more at us.allegion.com