This machine is a Challenge Style JH Paper Drilling Machine (Serial No. 18310), manufactured by The Challenge Machinery Co.. The "JH" style is part of a legacy line of single-spindle drills. Can drill through stacks up to 2" to 2.5" thick in a single stroke. Accommodating hollow drill bits ranging from 1/8" to 1/2" in diameter. Runs great and built like a tank. $600 OBO. Pick up in Denver. Does not come with drill bits. Thanks for looking.