***** **********Best Quality Guranteed. *****Manually punches up to 22 sheets (A4, letter size or below) of 80 gsm20 lb paper at a time. And binds up to 400 sheets (A4, letter size or below) of 80 gsm (20 lb) paper with a 51 mm (2 inches) comb ring*****One handle for punching, another for binding. Both with low force. *****Releasable 1-21 punching blade for different document sizes. *****Punching and binding add a professional finish to presentations, handbooks, proposals, and other office documents or files. *****Durable Metal Construction for Long-Lasting Use