2 in 1 electric punch and stapler punch up to 14 sheets 20 Lb paper punch hole diameter: 5.5 mm staple 24/6 or 26 /6 staples staple up to 20 sheets of 20 Lb paper with 26 /6 staples AC /DC adaptor 9 VDC, 1000 mA or option powered by 6 "AA" alklaine batteries elegant design for office use high quality plastic housing easy operation