Materials: Made of high quality iron,nickel plated.Sturdy not easily deformed.
Size: 2/3 inch diameter,The listed diameters are measured from the inner edge.
Multi-purpose binder rings: Wide range of uses such as loose-leaf, memo filing, key rings and sample holders.
metal round rings can be split into two halves and is held together by a metal swivel rivet which is located at the center of the ring,Pull to open and squeeze to lock, lock tight make sure not easy fall out.
Package Quantity: 100pcs book rings,You can easily connect many flipcharts, paper cards, name tags, instructions or plastic sheets together.