Offnova Binding Machine, 21-Hole 450 Sheet Paper Comb Punch, Adjustable Margin. ? More Budget Friendly - This binding machine comes with 100 packs of 3/8? comb binding and a comb protector so you don't have to buy any right away. Perfect for domestic use and for managing any type of small office related project. ? Lightweight but Capable - It only weighs 6.4lb, easy to carry to do your bindings in the most convenient location. And it can handle up to 12 sheets of paper in one go. ??Simple Control - The advanced cutting blade and the curved handle makes it easy to cut papers while requiring less force. All you have to do is align the paper yourself and it?ll do the rest. ?Accurate Punch Alignment - Utilizes a positioning knob to accurately place and position papers during the punching process. Suitable for Letter size, A4, and A5 sizes. ? High Effective and Save Time - Our binding machine allows for punching papers simultaneously while binding, which gives a continuous manner when doing massive binding tasks.