Ring Binder Donau Master lever-arch A4 75 mm copper — Donau 3970001PL-52

Lever-arch ring binder Donau Master for A4 documents with a 75 mm spine in copper colour is designed to store and organise punched papers and documents efficiently. The binder uses a lever mechanism that enables secure closing and quick, smooth opening of the rings. Its high-capacity spine accommodates large stacks of documents while keeping them aligned and protected, making the product suitable for regular filing, archival storage and environments that require frequent access to paperwork.

Advantages

The lever mechanism provides reliable, one-handed operation for opening and closing the rings and ensures that documents are held firmly without slippage. A 75 mm spine offers high capacity while maintaining a compact profile on shelving. Durable cover materials resist everyday wear and the reinforced ring assembly improves longevity under frequent use. The copper colour gives a professional, neutral appearance suitable for office and institutional settings.

Suitable for

• Office filing of contracts, reports and administrative paperwork
• School and university course materials and student portfolios
• Home organisation of manuals, receipts and household documents
• Archival storage of frequently accessed records and documentation

Key specifications

• Document format: A4
• Spine width: 75 mm
• Closure type: lever-arch mechanism
• Ring style: two metal rings suitable for punched paper
• Cover finish: copper-coloured exterior
• Capacity: accommodates large stacks of punched sheets

How to use

Open the binder by operating the lever to release the rings, insert punched papers onto the rings and close them using the lever until the rings are fully engaged. Arrange documents in the desired order and use dividers or sheet protectors as needed to separate sections and protect important pages. Store the binder upright on a shelf or flat in a drawer; when moving or transporting, ensure the rings are fully closed to prevent pages from catching or falling out.

Usage recommendations

For prolonged durability, avoid overfilling beyond the recommended spine capacity and handle the lever mechanism gently when opening and closing. Use standard punched A4 paper and compatible accessories such as dividers and transparent sleeves to improve organisation and protection of documents.