RilexAwhile Loose Leaf Binder Rings 3.5 inch Silver Tone Nickel Plated ( 7 Pcs ) 1. Loose leaf rings made of tough steel can withstand heavy use. 2. Ideal for fastening any size document stack. 3. Rings open and close easily and lock for extra security. 4. Strong nickel-plated steel rings won't crack, split or bend. 5.Rustproof rings are user friendly: pull to open, squeeze to close. Locking round rings lock securely to prevent your swatches, keys, sheets, memos, and invoices from falling out.