Electric three-hole punch delivers clean punches wherever you need it. With a convenient dual-power source, this push-button electric punch operates electronically when plugged in, or wire-free through battery operation. Load paper horizontally or vertically for ultimate convenience. Precision hollow steel punch heads slice through up to 20 sheets of 20 lb. paper and create 9/32" holes. Adjustable paper guide allows easy customization and ensures consistent hole-punch placement. Compact design also includes an easy-clean chip tray. Hole punch operates on six AA batteries (not included).