Heavy-duty stapler uses various sized staples to fasten 30 to 210 sheets. Design includes steel construction, nonskid rubber base and an adjustable throat depth guide. Throat depth measures 2″. A 1/4″ staple will fasten 30 sheets of 16 lb. paper. A 5/16″ staple fastens 50 sheets. A 3/8″ staple fastens 70 sheets. A 1/2″ staple fastens 100 sheets. A 9/16″ staple fastens 120 sheets. A 5/8″ staple fastens 140 sheets. A 13/16″ staple fastens 170 sheets. A 7/8″ staple fastens 200 sheets. A 15/16″ staple fastens 210 sheets. 210 Sheets Capacity – 1/4″, 1/2″, 3/8″, 5/8″, 9/16″, 13/16″, 15/16″, 7/8″, 3/4″, 5/16″ Staple Size – Putty, Black