Holes quantity : 21 Free Blades : 21 Holes size(mm) : 3*8 Pitch(Holes center distance) : 14.25mm Max Punching Capacity (80g) : 12 sheets Max Binding Capacity (sheets,80g) : 200sheets(22mm) Max Bind ring size : 22mm Edge distance : 3-6mm N./G.W. : Machine size : 400*210*280mm Packing Size : 415*185*275mm