Office Depot Brand Casebound 3-Ring Binder, 1 1/2" Round Rings, Green/Gold Lot of 3 Keeping memos and important paperwork neatly stored and organized can help ensure that you're able to work efficiently all day long. This Office Depot casebound binder provides a convenient spot to keep documents together and easily accessible, so you can find the papers you need more quickly. 3-ring design is compatible with most 3-hole punched papers. Round rings offer easy opening. Sturdy paperboard construction can endure constant handling.