Holes quantity : 21 Free Blades : 21 Holes size(mm) : 3*8 Pitch(Holes center distance) : 14.25mm Max Punching Capacity (80g) : 25 sheets Max Binding Capacity (sheets,80g) : 400sheets(45mm) Max Bind ring size : 51mm Edge distance : 3mm , 6mm , 9mm Machine size : 495*395*445mm Packing Size : 456*270*446mm