Portable 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 is based on 20-lb. bond. Sheet Capacity: 15; Operating Method: Electric; Number of Holes: 3; Hole Diameter: 9/32 in.