3 D Ring Binder Mechanism A5 & American Quarto Options

The 3 D Ring Binder Mechanism is a durable D‑shape ring mechanism, designed for riveting securely to the back cover of binders and folders. Engineered for professional stationery and binder manufacturing, this mechanism provides smooth operation, secure page retention, and long‑term reliability.

Designed to accept 3 D‑shaped rings, this range is available for different document formats, making it suitable for office binders, presentation folders, and bespoke stationery products. The D‑ring profile allows documents to sit flatter against the spine, improving organisation and maximising usable sheet capacity compared to traditional round rings.

Suitable for trade, commercial, and manufacturing environments, these 3 D ring mechanisms are a dependable solution for producing high‑quality binders and folders.

3 Ring Mech Options

3 D Ring Mechanism – A5 Sheet Length

• Ring Spacing: 70‑70mm

3 D Ring Mechanism – American Quarto (280mm)

• Ring Spacing: 108‑108mm

All variants are designed specifically for rivet fixing to the rear cover of binders.

• Product Type: 3 D ring binder mechanism
• Ring Shape: D‑shaped
• Ring Count: 3
• Mounting: Rivet‑mounted to back cover
• Sheet Compatibility: A5, American Quarto (280mm)
• Applications: Binders, folders, stationery manufacturing