CosCosX 10Pcs Metal Ring Binder Mechanisms Replacement Kit D_Shaped Rings Binder Mechanism for Binder Planners O_Shaped Rings Loose Leaf Binding Spines Combs for Personal Organizers Planners_15 Styles

HIGH QUALITY DURABLE AND STURDY:Made of high quality metal,durable.Suit for A4,A5,A6 size loose leaf notebook&planner with a broken ring binder mechanism. PLANTS AND WAREHOUSES:Keep your employees up-to-date on important company information;Clearly display material on whiteboards,cabinets,machinery and more. MULTIPLE USES:Ideal for binding and filing all types of documents invoices,index cards,etc. EASY TO USE:Thumb boosters make it easy to add or remove sheets; O-shaped rings let you quickly flip through charts and other material. The binder mechanism is screw type,easy to replace.Please check the detail size info in the picture.