2-ring binder mechanism spine is made of metal material, wear resistant and scratch resistant, can serve you a for lasting time. Designed with strong metal structure, won't crack, break or fade color., and great for most loose leaf diy, can be perfectly integrated with your items. Features - Color: As Shown -Material:Metal - Size: 12.60X3.00X2.00cm/4.95X1.18X0.79in -binder ring inner diameter: 20mm -binderring hole distance: 80mm - Simple design, 2 ring binder mechanism is suitable for various loose-leaf notebook or planner. - Detachable design, easy to replace and organize, the binder mechanism is screw type, easy to replace. - 2-hole design, meeting different binding needs, metal binding is firm and strong for lasting use. - Diy design, use this 2 ring binder mechanism to make your loose-leaf notebook more personalized. - Metal binder ring mechanism is not easy to break, practical and can be applied for a longer time. Packing list1 x binder mechanism