The Martin Yale 2051 SmartFold is exactly what it sounds like: it is one of the easiest, most effective letter folders to use. It has high memory capacity, with 7 pre-programmed folds and 10 other custom folds. It can create letter, half, z-fold, gate, church cut, engineering (short z-fold) and double parallel folds. 5 paper sizes are also preset. The 7-sensor diagnostics system for manageable trouble shooting makes easy set up. Visual feedback is provided by the LCD display. This office paper folder has the ability to feed a wide range of paper weights without any adjustment to the feed system, which saves time between different fold jobs. The feed tray can hold up to 500 sheets, and it folds at a variable speed of 3,000 to 15,000 per hour. Just tell this paper folder the details, and it does the rest. The Intimus SmartFold by Martin Yale can handle even the most complicated folds in an extremely smooth, efficient way.