High-speed automatic punch capable of producing 30,000 to 40,000 punched sheets per hour. Punches preprinted, collated documents directly from your copier or printer (including mixed stocks from 16 lb. bond to 110 lb. index). Also punches tabs pre-collated into the finished sets. Tabs must have minimum 1/4” shoulder.Hands free operation means your operator is free to perform other tasks. Large selection of punch dies available. VERSATILE, HANDS-FREE AUTOMATIC DOCUMENT PUNCHING The remarkable ALPHA-DOC® MKIII combines the versatility and ease of an office machine with the speed and efficiency of an automatic punch — for perfect holes every time. Simply load the tray, push a button and walk away for hands-free punching of pre-collated books, presentations, proposals, reports… and even tabbed sheets.