The Duplo System 5000 Collater/Booklet Maker offers automatic finishing at rates of up to 3,500 sets per hour. It offers either straight collating (with offset stacking) or collating and stapling (with straight stacking), and it also has an optional square backer unit that will give your piece a perfect bound look. It also offers an automatic self detection system that stops processing when an incorrect set is fed or when the staple cartridge empties or the receiving tray is full.