Tuvie says ”Lepen soldering pen system has been designed to offer convenience and safety for users when soldering. When I was in high school, I had to do a class work to build electronic circuits. Soldering is a basic skill, however, at that time, I had no clue how to do it the right way, thus, resulting burnt fingers. Existing soldering equipments are not convenient to use, it can cause dangerous situations such as fire and health issues (exposure to solder fumes can cause headaches, nausea, eye irritation or coughing). In order to solve these problems, Lepen uses the principle of a general pen and a pen holder”.
Source : tuvie