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The BUSINESS SOURCE BSN28525 is a dark blue, letter-size round-ring binder designed for organizing and protecting standard 8.5 x 11 inch documents. It features a back-mounted metal ring mechanism with two triggers for easy one-handed document access. The rings carry a 1/2 inch capacity, and the binder is constructed with a sturdy chipboard core covered in polypropylene material. The design allows the binder to lie flat when open, which makes page turning and writing easier during active use. Licensed trade buyers, office managers, and supply-chain professionals will find this a dependable unit for everyday filing applications.
This binder is suited for standard letter-size document organization in office, school, and light commercial environments. The inside front and back covers each feature a clear pocket that holds up to 30 sheets, providing additional storage for loose documents, reference sheets, or cover pages without punching. The flat-open design supports desk use, and the polypropylene exterior resists minor moisture and surface wear under normal office conditions.
Designed as a standard replacement or addition for letter-size round-ring binder applications using 8.5 x 11 inch documents with standard three-hole punch spacing.
No tools are required for setup or document loading. Open rings using the trigger mechanism only — do not force rings open manually, as this can misalign the mechanism. When loading documents, ensure hole punches align with all three rings before closing to prevent tearing. Store flat or upright on a shelf to maintain cover shape over time.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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