Wanpen’s roller planting marker was developed from her experience. When a problem occurred, she would alter and develop the tool according to the problem and rice variety.
Wanpen’s tool was designed to be lightweight, easy to handle and convenient to use. The handle was designed so that the tool can be pulled. The tool makes parallel and perpendicular lines to mark the planting locations, optimizing space between rows so that the rice is easily organized in lines without using too much energy.