Swingline 15-Sheet Electric Portable Desktop Punch, Silver/BlackPortable yet powerful! This electric punch makes quick works of big stacks of paper with the push of a button. Hinged chip door for easy paper clippings removal. Sleek design looks good on any desk. Operates on six AA batteries (sold separately) or AC adapter (included). Plastic. Sheet Capacity: 15; Operating Method: Electric; Number of Holes: 3; Hole Diameter: 9/32".