21-Hole 450 Sheets Paper Comb Punching Binding Punch Machine Binder Scrapbook Report 21-hole Comb Punching/Binding Machine features an advanced manual comb binding system that punches sheets up to 12 sheets and binds up to 450 sheets. Advanced carbide cutting blades ensure accurate cutting power Waste drawer for keeping paper scrap Vertical binding system, close coil completely Dual functional handle, bind and punch easily