DescriptionManufactured with premium material, practical and durable for longlasting use. Fine workmanship and beautiful appearance ensure thepopularity and practicality. Bring a professional and functional lookfor your report, book, notebook and calendar.Features-Color:Black -Material:Alloy -Size:4.00X2.50X2.50cm/1.57X0.98X0.98in -Manufactured with premium and good alloy material, practical and durable for long lasting use.-These book binder rings to meet your daily painting needs and convenient for you to turn pages. -The binder rings are meticulously made, and the color is not easy to peel off. -Well polished and smooth surface, will not hurt or scratch your hands. -Lightweight and portable, they are very convenient for you to carry. It is very useful.