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