SUMMI S-A4 Paper Cutter

any device for cutting or trimming paper, typically a weighted, powered, or spring-hinged blade mounted on or over a ruled board or table on which many sheets of paper may be aligned for cutting at one time.The unique rotary cutting blade runs along a steel flat blade which works much like a scissor cutting motion while producing a clean, precise cut whilst self-sharpening the rotary blade at the same time