Tackle your biggest punching jobs with hollow punch head technology that powers through stacks of paper with less force, more ease. Built-in paper guide offers easy paper positioning and punching. Preset to drill holes for standard three-ring binders. Large waste tray. Heavy-gauge steel construction with nonskid base. Replacement punch heads and punch disk sets sold separately. Sheet Capacity: 300; Operating Method: Manual; Number of Holes: 3; Hole Diameter: 9/32".