Deli 3874 Manual Comb Steel Body Heavy Duty binding machine is an all-metal, die cast, heavy duty, extra reliable, and use friendly machine. Punch Easy Effort, Fashionable and Stylish, 25 Hole Punching Mechanism, Beautifully Simple Bookbinding, Binds up to 450 sheets of 80gsm Paper, Punches up to 15 Sheets of 80gsm Paper, 10000 punch through high standards of Testing, Variable punching margin control 2.5mm – 6.5mm, Deli 3874 Steel Body Heavy Duty Spiral Binding Machine, 25 sheets / 70g maximum punch capacity, 450 sheets maximum binding capacity, 1-25 holes, 14.8mm distance between holes, 10.3kg net weight.