Steel Binding Combs 3-Ring and 4-Ring Loose Leaf Book Binder Hinged Clamp Comb Binding Spines Stainless Steel Color 292x23.5x23.5mm Hole: 4x5mm 2 SETS 2 STYLES RING BINDER MECHANISMS: Package include 2 styles ring binder mechanisms, 1pcs of each style, 2 sets in total. 2 different sizes of folders for different paper sizes and organization needs. STEEL RING BINDER: The ring binder unit replacement kit is made of metal and features a round-ring design that is durable and resistant to breakage, and D-rings that allow you to quickly flip through charts and other materials. SIZE: The size of 44 ring clip: approx. 292x23.5x23.5mm (11.5x0.93x0.93 inch), 1pcs; finger rings: approx. 7x7.5mm(0.28x0.30 inch), 2pcs; nuts: approx. 3x7.5mm(0.12x0.30inch), 2pcs; 3 ring clip: approx. 280x24x24.5mm(11x0.94x0.96 inch), 1pcs; finger rings: approx. 7x7.5mm(0.28x0.30 inch), 2pcs; nuts: approx. 3x7.5mm(0.12x0.30inch), 2pcs. EASY TO USE: The carefully designed metal loose-leaf ring splits in half and attaches tightly with metal swivel rivets to ensure that the bookbinder locks securely and tightly, preventing paper from falling loose or loosening. WIDE APPLICATION: These metal binders can be easily unfolded and closed for flexible DIY travel journals, photo albums, scrapbooks, loose-leaf notebooks and graduation books. Suitable for school and office use.