GBC Swingline GBC Incredibly versatile design, stapling and punching in one machine. Rugged metal and plastic construction. Electric operation. Round-shaped punch. Extra-large throat accommodates oversized paper. Adjusts from two to three holes. Simple push-button operation makes punching a breeze. Guides help ensure perfect paper alignment and stapling for great results. Jam reversing knob clears jams with ease so you don't get stuck mid-job. Chip drawer has an easy-view window so you can see when it's time to empty. Caution: Blade capacities are based on lbs. bond. As more heads are added to a punch, the sheet-piercing capacity decreases.