Chris-Wang 10Pcs Metal 3-Ring Binding Spines Combs, Loose Leaf Binder DIY Photo Album Rings Book Calendar Round Circle, 0.75-Inch Spine Diameter, Black Product Name: 3-Hole Binding Spines; Package Included: 10Pcs Binding Spines. DIMENSIONS: Hole Pitch: 2cm; Rind Diameter: 2cm; Sheets Capacity: about 100 Pages. Color: Black; Made by high quality steel, rings won't crack, split or bend. Chris-Wang comb binding gives a professional appearance to bound reports and presentations. For use with Chris-Wang or Standard B5/A5/A6/A7 Size 6-hole or 9-hole binder system. Or you can punch the hole according to your needs.