MAKEASY Binding Machine, 21-Hole, 450 Sheet, Paper Punch Binder with Starter Kit Description Specifications Free gift: 100 x 3/8'' PVC comb Bindings 21 Ring Punching Capacity: 12 Sheets (A4 80g) Binding Capacity: 450 Sheets (A4)/ up to 51mm plastic ring Hole Size: 3*8mm Rectangle ...MAKEASY Binding Machine, 21-Hole, 450 Sheet, Paper Punch Binder with Starter Kit Description Specifications Free gift: 100 x 3/8'' PVC comb Bindings 21 Ring Punching Capacity: 12 Sheets (A4 80g) Binding Capacity: 450 Sheets (A4)/ up to 51mm plastic ring Hole Size: 3*8mm Rectangle, Totally 21 Customize the paper margin : 3mm/4mm/5mm Ideal for: A4 document paper Machine Size: 14.5*10.2*9.2 Inch Important Tips! MAKEASY Paper Binder comes with oiled cutting blade for high-quality paper cutting. To avoid staining on paper, please use a paper tissue to clean the blade before first use. Features: --Great Value for MoneyOur binding machine come with 100pcs of 3/8'' black 21-ring PVC comb bindings in the package ----- Max binding capacity: 450 sheets (with 2'' comb plastic bindings ) ----- Max punch capacity: 10-12 sheets(Paper Thickness: 80g(20lb) paper) Note: If you use paper of other thickness, please reduce the paper according to the actual situation! --Humanized Desig)