uxcell Metal Book Office Binder Hinge Snap Loose Leaf Ring Keyring 3" Diameter 3pcs Closed tight, not scattered after collapse,let your books organized. Wide range of uses such as loose-leaf, memo filing, key rings and sample holders. You can easily link numerous loose-leaf booklets, paper cards, name tags, instruction guides or plastic plates together. Material: Metal;Overall Size: 88 x 80 x 4mm/3.5" x 3.1" x 0.16"(OD*Inner Dia.*T) Color: Silver Tone;Package Content: 3 x Loose Leaf Ring; Product Name: Loose Leaf Ring;Net Weight: 83g