Makes quick work of big punching jobs. The hollow punch head technology requires less force. Oversized handle for easy drilling. Built-in paper guide offers easy paper positioning and punching. Preset to drill holes for standard three-ring binders. Large, easy-to empty waste tray. Replacement punch heads and punch disk sets sold separately. Plastic and steel. Sheet Capacity: 150; Operating Method: Manual; Number of Holes: 3; Hole Diameter: 9/32 in.