The size before the knife shows the size that this knife will cut out, and the size after the knife shows the remaining size. Each time the knife is cut, the size before the knife is automatically cleared without disturbing the size of the next knife. The double digital display reads directly without calculation, which is clear at a glance, very convenient, and also improves the cutting work efficiency. The above is an introduction to the performance of the dual-rail digital display paper cutter, for reference only!