DUO Fastening System 8
The DUO Fastening System is a professional concealed frame connector solution designed for strong, precise, and fully disassemblable timber joints. Engineered for furniture, bed frames, stairs, and architectural joinery, DUO connectors create self-tightening, load-bearing connections that remain completely hidden within the wood.
Manufactured from high-strength, blue-galvanized steel, DUO connectors provide reliable performance across a wide range of frame applications. Each connector hooks together quickly during installation, pulls the joint tight automatically, and can be re-tightened over time to accommodate natural wood movement. The result is a clean, durable connection without visible fasteners, brackets, or hardware.
Built for CNC machining, workshop prefabrication, and on-site assembly, the DUO Fastening System supports efficient production while allowing repeated disassembly for transport, installation, or future service.
Concealed, Self-Tightening Frame Connections
DUO connectors use a concealed hook-in geometry that delivers immediate load-bearing strength once installed. Adjustable screw fixation allows fine-tuning during assembly and long-term re-tightening as timber settles, ensuring stable joints without glue or clamps.
The system covers a wide range of load requirements, from slim connectors for bed frames and furniture rails to heavy-duty connectors designed for structural frame joints and stair construction.
Designed for Furniture, Beds, and Timber Frames
The DUO Fastening System is widely used in applications where strength, precision, and clean aesthetics are critical, including:
- Bed frames and knock-down furniture
- Tables, benches, and seating frames
- Stair stringers and handrails
- Timber frame connections
- Architectural and commercial millwork
All DUO connectors are tested and certified by Holzforschung Austria, with documented load values to support safe, repeatable construction.
Fast Installation, Flexible Assembly
DUO connectors are optimized for CNC routing, long-hole drilling, and manual installation using routers or drilling jigs. Their concealed design allows parts to be transported flat, assembled quickly on site, and disassembled again without damage.
Explore the DUO Fastening System below to select the connector size and load class that best fits your frame construction requirements.