APPLY TO - Loose-leaf book rings can be used in many situations, such as the office, classroom, or home. It is widely used in the production of loose-leaf books, paper cards, key rings and other items, scrapbooks, handmade diaries, and document binding. Photos, small cards such as notebooks, word cards, index cards, memory cards, and other items.SPECIFICATION: Color: OrangeMaterial: carbon steelOuter Diameter: 30mm/ 1.18inchInner Diameter: 25mm/ 0.98inchThickness: 2.2mm/ 0.09inchQUANTITY INCLUDED - 24pcs x Split Keychain RingsADVANTAGE - Our keychain opens and closes smoothly and is easy to use. Pull firmly on the loop to quickly connect and release to automatically open or close.INSTALL - Open and close smoothly, easy to use.