Description Manufactured with metal material, practical and durable for long lasting use.These book binder rings mechanisms can meet yourloose leaf book DIY making. Well polished and smooth surface, will not hurt or scratch your hands. Features -Color:Silver-Material:Metal-Size:29.50X2.00X2.00cm/11.59X0.79X0.79in-Size:22.00X2.00X2.00cm/8.65X0.79X0.79in-Size:17.50X2.00X2.00cm/6.88X0.79X0.79in-Size:12.50X2.00X2.00cm/4.91X0.79X0.79in-The loose leaf binder mechanisms are made of sturdy metal, which are durable, not easy to break. -You will get the binder rings mechanisms for loose leaf book , enough quantity for using in different places at one time. -The round rings can be opened and closed when you need to add or remove pages and hold pages securely. -Designed for everyday use, nice for organizing projects, presentations, loose leaf book DIY, and more. -Suitable for many occasions to use, such as office and home, giving you a wonderful experience and bring you a good mood. Packing list: 2 x A4 4 rings binders2 x A5 20 rings binders2 x A6 6 rings binders2 x A7 2 rings binders