1、Superior tinplate ring, not easy to rust and deform, long durability. 2、Wide application, used with hole punch, can bind documents, DIY photo albums, etc. 3、3 specifications are available, 19mm can hold about 100pcs paper, 25mm can hold about 130pcs, 32mm can hold about 220pcs. 4、S-type buckle, which is tight and smooth, practical and dependable to use. 5、Easy for disassembling, first open the buckle up and down, and then pull the iron ring left and right. 1 Box of Book Binder (30pcs) Condition: 100% Brand NewItem Type: Book BinderMaterial: TinplateColor: As picture shownOptional Type: SQ-19, SQ-25, SQ-32Quantity: 30pcs/boxClamping Paper Specification:19mm/ 0.7in can hold about 100pcs paper25mm/1in can hold about 130pcs paper32mm/ 1.3in can hold about 220pcs paper