Steel A4 Notebook 3-Ring Binder Mechanism, D Rings, Loose Leaf Binding Spines Combs for Organizers Planners, Stainless Steel Color

Size: about 1.08 inch(2.75cm) wide, 11.02 inch(28cm) long, 1.18 inch(3cm) thick, hole: 0.22x0.16 inch(0.55x0.4cm), 0.79 inch(2cm) inner diameter;

screw: 0.30x0.31 inch(0.75x0.8cm), pin: 0.11 inch(0.28cm), 2pcs;

nut: 0.14x0.31 inch(0.35x0.8cm), 0.11 inch(0.28cm) inner diameter, 2pcs.