Binding form: Plastic comb, clamp strap Strong punching ability & has 21 adjustable holes margin. The Maximum thickness of binding: 30mm ring plastic comb, 50mm ellipse plastic comb The maximum thickness of punching: 20 pages (80g) Margin control: can adjust Max. Binding width: Below 300mm Hole distance: 14.3mm, 21 holes Adjustable margin: 2.5-6.5mm Design of section: 3.0*8.0mm Quantity of movable cutter: 21 pieces Punching form: Manual The cutting life of blade: <100,000 times The parts can supply: cutting blade The range of binding: below A4