The DSB CB-122 Comb Binding Machines offer users the flexibility to Bind up to 500 sheets of paper and Punch up to 12 sheets in one operation. Additional functions include the Paper Thickness Guide that helps the user to select the correctly sized plastic comb and a Step Adjustment Margin Guide which allows you to move the depth of the punches to the perfect place. You can also adjust the Left Hand Edge Guide for perfect binding of A4 or Letter sized documents The CB122 Manual Comb Binding Machine is one of DSB"s newly designed products which has a High Binding Capacity at an Economical Price. The Adjustable Edge Guide & Measuring Gauge offer the User a very efficient way of choosing the perfect comb size along with setting out the best documents bound position.